ip_fw_table.c revision 293625
1200590Sluigi/*- 2200673Sru * Copyright (c) 2004 Ruslan Ermilov and Vsevolod Lobko. 3272840Smelifaro * Copyright (c) 2014 Yandex LLC 4272840Smelifaro * Copyright (c) 2014 Alexander V. Chernikov 5200590Sluigi * 6200590Sluigi * Redistribution and use in source and binary forms, with or without 7200590Sluigi * modification, are permitted provided that the following conditions 8200590Sluigi * are met: 9200590Sluigi * 1. Redistributions of source code must retain the above copyright 10200590Sluigi * notice, this list of conditions and the following disclaimer. 11200590Sluigi * 2. Redistributions in binary form must reproduce the above copyright 12200590Sluigi * notice, this list of conditions and the following disclaimer in the 13200590Sluigi * documentation and/or other materials provided with the distribution. 14200590Sluigi * 15200590Sluigi * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16200590Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17200590Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18200590Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19200590Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20200590Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21200590Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22200590Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23200590Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24200590Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25200590Sluigi * SUCH DAMAGE. 26200590Sluigi */ 27200590Sluigi 28200590Sluigi#include <sys/cdefs.h> 29200590Sluigi__FBSDID("$FreeBSD: head/sys/netpfil/ipfw/ip_fw_table.c 293625 2016-01-10 00:28:44Z melifaro $"); 30200590Sluigi 31200590Sluigi/* 32272840Smelifaro * Lookup table support for ipfw. 33200601Sluigi * 34272840Smelifaro * This file contains handlers for all generic tables' operations: 35272840Smelifaro * add/del/flush entries, list/dump tables etc.. 36200838Sluigi * 37272840Smelifaro * Table data modification is protected by both UH and runtime lock 38272840Smelifaro * while reading configuration/data is protected by UH lock. 39272840Smelifaro * 40272840Smelifaro * Lookup algorithms for all table types are located in ip_fw_table_algo.c 41200590Sluigi */ 42200590Sluigi 43225518Sjhb#include "opt_ipfw.h" 44200590Sluigi 45200590Sluigi#include <sys/param.h> 46200590Sluigi#include <sys/systm.h> 47200590Sluigi#include <sys/malloc.h> 48200590Sluigi#include <sys/kernel.h> 49200590Sluigi#include <sys/lock.h> 50200590Sluigi#include <sys/rwlock.h> 51272840Smelifaro#include <sys/rmlock.h> 52200590Sluigi#include <sys/socket.h> 53272840Smelifaro#include <sys/socketvar.h> 54240494Sglebius#include <sys/queue.h> 55200590Sluigi#include <net/if.h> /* ip_fw.h requires IFNAMSIZ */ 56200590Sluigi 57200590Sluigi#include <netinet/in.h> 58201732Sluigi#include <netinet/ip_var.h> /* struct ipfw_rule_ref */ 59200590Sluigi#include <netinet/ip_fw.h> 60200590Sluigi 61240494Sglebius#include <netpfil/ipfw/ip_fw_private.h> 62272840Smelifaro#include <netpfil/ipfw/ip_fw_table.h> 63240494Sglebius 64272840Smelifaro /* 65272840Smelifaro * Table has the following `type` concepts: 66272840Smelifaro * 67272840Smelifaro * `no.type` represents lookup key type (addr, ifp, uid, etc..) 68272840Smelifaro * vmask represents bitmask of table values which are present at the moment. 69272840Smelifaro * Special IPFW_VTYPE_LEGACY ( (uint32_t)-1 ) represents old 70272840Smelifaro * single-value-for-all approach. 71272840Smelifaro */ 72272840Smelifarostruct table_config { 73272840Smelifaro struct named_object no; 74272840Smelifaro uint8_t tflags; /* type flags */ 75272840Smelifaro uint8_t locked; /* 1 if locked from changes */ 76272840Smelifaro uint8_t linked; /* 1 if already linked */ 77272840Smelifaro uint8_t ochanged; /* used by set swapping */ 78272840Smelifaro uint8_t vshared; /* 1 if using shared value array */ 79272840Smelifaro uint8_t spare[3]; 80272840Smelifaro uint32_t count; /* Number of records */ 81272840Smelifaro uint32_t limit; /* Max number of records */ 82272840Smelifaro uint32_t vmask; /* bitmask with supported values */ 83272840Smelifaro uint32_t ocount; /* used by set swapping */ 84272840Smelifaro uint64_t gencnt; /* generation count */ 85272840Smelifaro char tablename[64]; /* table name */ 86272840Smelifaro struct table_algo *ta; /* Callbacks for given algo */ 87272840Smelifaro void *astate; /* algorithm state */ 88272840Smelifaro struct table_info ti_copy; /* data to put to table_info */ 89272840Smelifaro struct namedobj_instance *vi; 90272840Smelifaro}; 91200590Sluigi 92282070Smelifarostatic int find_table_err(struct namedobj_instance *ni, struct tid_info *ti, 93282070Smelifaro struct table_config **tc); 94272840Smelifarostatic struct table_config *find_table(struct namedobj_instance *ni, 95272840Smelifaro struct tid_info *ti); 96272840Smelifarostatic struct table_config *alloc_table_config(struct ip_fw_chain *ch, 97272840Smelifaro struct tid_info *ti, struct table_algo *ta, char *adata, uint8_t tflags); 98272840Smelifarostatic void free_table_config(struct namedobj_instance *ni, 99272840Smelifaro struct table_config *tc); 100272840Smelifarostatic int create_table_internal(struct ip_fw_chain *ch, struct tid_info *ti, 101272840Smelifaro char *aname, ipfw_xtable_info *i, uint16_t *pkidx, int ref); 102272840Smelifarostatic void link_table(struct ip_fw_chain *ch, struct table_config *tc); 103272840Smelifarostatic void unlink_table(struct ip_fw_chain *ch, struct table_config *tc); 104272840Smelifarostatic int find_ref_table(struct ip_fw_chain *ch, struct tid_info *ti, 105272840Smelifaro struct tentry_info *tei, uint32_t count, int op, struct table_config **ptc); 106272840Smelifaro#define OP_ADD 1 107272840Smelifaro#define OP_DEL 0 108272840Smelifarostatic int export_tables(struct ip_fw_chain *ch, ipfw_obj_lheader *olh, 109272840Smelifaro struct sockopt_data *sd); 110272840Smelifarostatic void export_table_info(struct ip_fw_chain *ch, struct table_config *tc, 111272840Smelifaro ipfw_xtable_info *i); 112272840Smelifarostatic int dump_table_tentry(void *e, void *arg); 113272840Smelifarostatic int dump_table_xentry(void *e, void *arg); 114200590Sluigi 115272840Smelifarostatic int swap_tables(struct ip_fw_chain *ch, struct tid_info *a, 116272840Smelifaro struct tid_info *b); 117200590Sluigi 118290332Saestatic int check_table_name(const char *name); 119272840Smelifarostatic int check_table_space(struct ip_fw_chain *ch, struct tableop_state *ts, 120272840Smelifaro struct table_config *tc, struct table_info *ti, uint32_t count); 121272840Smelifarostatic int destroy_table(struct ip_fw_chain *ch, struct tid_info *ti); 122232865Smelifaro 123272840Smelifarostatic struct table_algo *find_table_algo(struct tables_config *tableconf, 124272840Smelifaro struct tid_info *ti, char *name); 125232865Smelifaro 126272840Smelifarostatic void objheader_to_ti(struct _ipfw_obj_header *oh, struct tid_info *ti); 127272840Smelifarostatic void ntlv_to_ti(struct _ipfw_obj_ntlv *ntlv, struct tid_info *ti); 128272840Smelifaro 129272840Smelifaro#define CHAIN_TO_NI(chain) (CHAIN_TO_TCFG(chain)->namehash) 130272840Smelifaro#define KIDX_TO_TI(ch, k) (&(((struct table_info *)(ch)->tablestate)[k])) 131272840Smelifaro 132272840Smelifaro#define TA_BUF_SZ 128 /* On-stack buffer for add/delete state */ 133272840Smelifaro 134272840Smelifarovoid 135272840Smelifarorollback_toperation_state(struct ip_fw_chain *ch, void *object) 136272840Smelifaro{ 137272840Smelifaro struct tables_config *tcfg; 138272840Smelifaro struct op_state *os; 139272840Smelifaro 140272840Smelifaro tcfg = CHAIN_TO_TCFG(ch); 141272840Smelifaro TAILQ_FOREACH(os, &tcfg->state_list, next) 142272840Smelifaro os->func(object, os); 143272840Smelifaro} 144272840Smelifaro 145272840Smelifarovoid 146272840Smelifaroadd_toperation_state(struct ip_fw_chain *ch, struct tableop_state *ts) 147272840Smelifaro{ 148272840Smelifaro struct tables_config *tcfg; 149272840Smelifaro 150272840Smelifaro tcfg = CHAIN_TO_TCFG(ch); 151272840Smelifaro TAILQ_INSERT_HEAD(&tcfg->state_list, &ts->opstate, next); 152272840Smelifaro} 153272840Smelifaro 154272840Smelifarovoid 155272840Smelifarodel_toperation_state(struct ip_fw_chain *ch, struct tableop_state *ts) 156272840Smelifaro{ 157272840Smelifaro struct tables_config *tcfg; 158272840Smelifaro 159272840Smelifaro tcfg = CHAIN_TO_TCFG(ch); 160272840Smelifaro TAILQ_REMOVE(&tcfg->state_list, &ts->opstate, next); 161272840Smelifaro} 162272840Smelifaro 163272840Smelifarovoid 164272840Smelifarotc_ref(struct table_config *tc) 165272840Smelifaro{ 166272840Smelifaro 167272840Smelifaro tc->no.refcnt++; 168272840Smelifaro} 169272840Smelifaro 170272840Smelifarovoid 171272840Smelifarotc_unref(struct table_config *tc) 172272840Smelifaro{ 173272840Smelifaro 174272840Smelifaro tc->no.refcnt--; 175272840Smelifaro} 176272840Smelifaro 177272840Smelifarostatic struct table_value * 178272840Smelifaroget_table_value(struct ip_fw_chain *ch, struct table_config *tc, uint32_t kidx) 179272840Smelifaro{ 180272840Smelifaro struct table_value *pval; 181272840Smelifaro 182272840Smelifaro pval = (struct table_value *)ch->valuestate; 183272840Smelifaro 184272840Smelifaro return (&pval[kidx]); 185272840Smelifaro} 186272840Smelifaro 187272840Smelifaro 188201120Sluigi/* 189272840Smelifaro * Checks if we're able to insert/update entry @tei into table 190272840Smelifaro * w.r.t @tc limits. 191272840Smelifaro * May alter @tei to indicate insertion error / insert 192272840Smelifaro * options. 193272840Smelifaro * 194272840Smelifaro * Returns 0 if operation can be performed/ 195201120Sluigi */ 196272840Smelifarostatic int 197272840Smelifarocheck_table_limit(struct table_config *tc, struct tentry_info *tei) 198272840Smelifaro{ 199272840Smelifaro 200272840Smelifaro if (tc->limit == 0 || tc->count < tc->limit) 201272840Smelifaro return (0); 202272840Smelifaro 203272840Smelifaro if ((tei->flags & TEI_FLAGS_UPDATE) == 0) { 204272840Smelifaro /* Notify userland on error cause */ 205272840Smelifaro tei->flags |= TEI_FLAGS_LIMIT; 206272840Smelifaro return (EFBIG); 207272840Smelifaro } 208272840Smelifaro 209272840Smelifaro /* 210272840Smelifaro * We have UPDATE flag set. 211272840Smelifaro * Permit updating record (if found), 212272840Smelifaro * but restrict adding new one since we've 213272840Smelifaro * already hit the limit. 214272840Smelifaro */ 215272840Smelifaro tei->flags |= TEI_FLAGS_DONTADD; 216272840Smelifaro 217272840Smelifaro return (0); 218272840Smelifaro} 219272840Smelifaro 220232865Smelifaro/* 221272840Smelifaro * Convert algorithm callback return code into 222272840Smelifaro * one of pre-defined states known by userland. 223232865Smelifaro */ 224272840Smelifarostatic void 225272840Smelifarostore_tei_result(struct tentry_info *tei, int op, int error, uint32_t num) 226272840Smelifaro{ 227272840Smelifaro int flag; 228201120Sluigi 229272840Smelifaro flag = 0; 230232865Smelifaro 231272840Smelifaro switch (error) { 232272840Smelifaro case 0: 233272840Smelifaro if (op == OP_ADD && num != 0) 234272840Smelifaro flag = TEI_FLAGS_ADDED; 235272840Smelifaro if (op == OP_DEL) 236272840Smelifaro flag = TEI_FLAGS_DELETED; 237272840Smelifaro break; 238272840Smelifaro case ENOENT: 239272840Smelifaro flag = TEI_FLAGS_NOTFOUND; 240272840Smelifaro break; 241272840Smelifaro case EEXIST: 242272840Smelifaro flag = TEI_FLAGS_EXISTS; 243272840Smelifaro break; 244272840Smelifaro default: 245272840Smelifaro flag = TEI_FLAGS_ERROR; 246272840Smelifaro } 247232865Smelifaro 248272840Smelifaro tei->flags |= flag; 249272840Smelifaro} 250272840Smelifaro 251272840Smelifaro/* 252272840Smelifaro * Creates and references table with default parameters. 253272840Smelifaro * Saves table config, algo and allocated kidx info @ptc, @pta and 254272840Smelifaro * @pkidx if non-zero. 255272840Smelifaro * Used for table auto-creation to support old binaries. 256272840Smelifaro * 257272840Smelifaro * Returns 0 on success. 258272840Smelifaro */ 259272840Smelifarostatic int 260272840Smelifarocreate_table_compat(struct ip_fw_chain *ch, struct tid_info *ti, 261272840Smelifaro uint16_t *pkidx) 262232865Smelifaro{ 263272840Smelifaro ipfw_xtable_info xi; 264272840Smelifaro int error; 265232865Smelifaro 266272840Smelifaro memset(&xi, 0, sizeof(xi)); 267272840Smelifaro /* Set default value mask for legacy clients */ 268272840Smelifaro xi.vmask = IPFW_VTYPE_LEGACY; 269272840Smelifaro 270272840Smelifaro error = create_table_internal(ch, ti, NULL, &xi, pkidx, 1); 271272840Smelifaro if (error != 0) 272272840Smelifaro return (error); 273272840Smelifaro 274272840Smelifaro return (0); 275232865Smelifaro} 276232865Smelifaro 277272840Smelifaro/* 278272840Smelifaro * Find and reference existing table optionally 279272840Smelifaro * creating new one. 280272840Smelifaro * 281272840Smelifaro * Saves found table config into @ptc. 282272840Smelifaro * Note function may drop/acquire UH_WLOCK. 283272840Smelifaro * Returns 0 if table was found/created and referenced 284272840Smelifaro * or non-zero return code. 285272840Smelifaro */ 286272840Smelifarostatic int 287272840Smelifarofind_ref_table(struct ip_fw_chain *ch, struct tid_info *ti, 288272840Smelifaro struct tentry_info *tei, uint32_t count, int op, 289272840Smelifaro struct table_config **ptc) 290200590Sluigi{ 291272840Smelifaro struct namedobj_instance *ni; 292272840Smelifaro struct table_config *tc; 293272840Smelifaro uint16_t kidx; 294272840Smelifaro int error; 295200590Sluigi 296272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 297232865Smelifaro 298272840Smelifaro ni = CHAIN_TO_NI(ch); 299272840Smelifaro tc = NULL; 300272840Smelifaro if ((tc = find_table(ni, ti)) != NULL) { 301272840Smelifaro /* check table type */ 302282070Smelifaro if (tc->no.subtype != ti->type) 303232865Smelifaro return (EINVAL); 304272840Smelifaro 305272840Smelifaro if (tc->locked != 0) 306272840Smelifaro return (EACCES); 307272840Smelifaro 308272840Smelifaro /* Try to exit early on limit hit */ 309272840Smelifaro if (op == OP_ADD && count == 1 && 310272840Smelifaro check_table_limit(tc, tei) != 0) 311272840Smelifaro return (EFBIG); 312272840Smelifaro 313272840Smelifaro /* Reference and return */ 314272840Smelifaro tc->no.refcnt++; 315272840Smelifaro *ptc = tc; 316272840Smelifaro return (0); 317272840Smelifaro } 318272840Smelifaro 319272840Smelifaro if (op == OP_DEL) 320272840Smelifaro return (ESRCH); 321272840Smelifaro 322272840Smelifaro /* Compability mode: create new table for old clients */ 323272840Smelifaro if ((tei->flags & TEI_FLAGS_COMPAT) == 0) 324272840Smelifaro return (ESRCH); 325272840Smelifaro 326272840Smelifaro IPFW_UH_WUNLOCK(ch); 327272840Smelifaro error = create_table_compat(ch, ti, &kidx); 328272840Smelifaro IPFW_UH_WLOCK(ch); 329272840Smelifaro 330272840Smelifaro if (error != 0) 331272840Smelifaro return (error); 332272840Smelifaro 333272840Smelifaro tc = (struct table_config *)ipfw_objhash_lookup_kidx(ni, kidx); 334272840Smelifaro KASSERT(tc != NULL, ("create_table_compat returned bad idx %d", kidx)); 335272840Smelifaro 336272840Smelifaro /* OK, now we've got referenced table. */ 337272840Smelifaro *ptc = tc; 338272840Smelifaro return (0); 339272840Smelifaro} 340272840Smelifaro 341272840Smelifaro/* 342272840Smelifaro * Rolls back already @added to @tc entries using state array @ta_buf_m. 343272840Smelifaro * Assume the following layout: 344272840Smelifaro * 1) ADD state (ta_buf_m[0] ... t_buf_m[added - 1]) for handling update cases 345272840Smelifaro * 2) DEL state (ta_buf_m[count[ ... t_buf_m[count + added - 1]) 346272840Smelifaro * for storing deleted state 347272840Smelifaro */ 348272840Smelifarostatic void 349272840Smelifarorollback_added_entries(struct ip_fw_chain *ch, struct table_config *tc, 350272840Smelifaro struct table_info *tinfo, struct tentry_info *tei, caddr_t ta_buf_m, 351272840Smelifaro uint32_t count, uint32_t added) 352272840Smelifaro{ 353272840Smelifaro struct table_algo *ta; 354272840Smelifaro struct tentry_info *ptei; 355272840Smelifaro caddr_t v, vv; 356272840Smelifaro size_t ta_buf_sz; 357272840Smelifaro int error, i; 358272840Smelifaro uint32_t num; 359272840Smelifaro 360272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 361272840Smelifaro 362272840Smelifaro ta = tc->ta; 363272840Smelifaro ta_buf_sz = ta->ta_buf_size; 364272840Smelifaro v = ta_buf_m; 365272840Smelifaro vv = v + count * ta_buf_sz; 366272840Smelifaro for (i = 0; i < added; i++, v += ta_buf_sz, vv += ta_buf_sz) { 367272840Smelifaro ptei = &tei[i]; 368272840Smelifaro if ((ptei->flags & TEI_FLAGS_UPDATED) != 0) { 369272840Smelifaro 370272840Smelifaro /* 371272840Smelifaro * We have old value stored by previous 372272840Smelifaro * call in @ptei->value. Do add once again 373272840Smelifaro * to restore it. 374272840Smelifaro */ 375272840Smelifaro error = ta->add(tc->astate, tinfo, ptei, v, &num); 376272840Smelifaro KASSERT(error == 0, ("rollback UPDATE fail")); 377272840Smelifaro KASSERT(num == 0, ("rollback UPDATE fail2")); 378272840Smelifaro continue; 379232865Smelifaro } 380272840Smelifaro 381272840Smelifaro error = ta->prepare_del(ch, ptei, vv); 382272840Smelifaro KASSERT(error == 0, ("pre-rollback INSERT failed")); 383272840Smelifaro error = ta->del(tc->astate, tinfo, ptei, vv, &num); 384272840Smelifaro KASSERT(error == 0, ("rollback INSERT failed")); 385272840Smelifaro tc->count -= num; 386272840Smelifaro } 387272840Smelifaro} 388272840Smelifaro 389272840Smelifaro/* 390272840Smelifaro * Prepares add/del state for all @count entries in @tei. 391272840Smelifaro * Uses either stack buffer (@ta_buf) or allocates a new one. 392272840Smelifaro * Stores pointer to allocated buffer back to @ta_buf. 393272840Smelifaro * 394272840Smelifaro * Returns 0 on success. 395272840Smelifaro */ 396272840Smelifarostatic int 397272840Smelifaroprepare_batch_buffer(struct ip_fw_chain *ch, struct table_algo *ta, 398272840Smelifaro struct tentry_info *tei, uint32_t count, int op, caddr_t *ta_buf) 399272840Smelifaro{ 400272840Smelifaro caddr_t ta_buf_m, v; 401272840Smelifaro size_t ta_buf_sz, sz; 402272840Smelifaro struct tentry_info *ptei; 403272840Smelifaro int error, i; 404272840Smelifaro 405272840Smelifaro error = 0; 406272840Smelifaro ta_buf_sz = ta->ta_buf_size; 407272840Smelifaro if (count == 1) { 408272840Smelifaro /* Sigle add/delete, use on-stack buffer */ 409272840Smelifaro memset(*ta_buf, 0, TA_BUF_SZ); 410272840Smelifaro ta_buf_m = *ta_buf; 411272840Smelifaro } else { 412272840Smelifaro 413272840Smelifaro /* 414272840Smelifaro * Multiple adds/deletes, allocate larger buffer 415272840Smelifaro * 416272840Smelifaro * Note we need 2xcount buffer for add case: 417272840Smelifaro * we have hold both ADD state 418272840Smelifaro * and DELETE state (this may be needed 419272840Smelifaro * if we need to rollback all changes) 420272840Smelifaro */ 421272840Smelifaro sz = count * ta_buf_sz; 422272840Smelifaro ta_buf_m = malloc((op == OP_ADD) ? sz * 2 : sz, M_TEMP, 423272840Smelifaro M_WAITOK | M_ZERO); 424272840Smelifaro } 425272840Smelifaro 426272840Smelifaro v = ta_buf_m; 427272840Smelifaro for (i = 0; i < count; i++, v += ta_buf_sz) { 428272840Smelifaro ptei = &tei[i]; 429272840Smelifaro error = (op == OP_ADD) ? 430272840Smelifaro ta->prepare_add(ch, ptei, v) : ta->prepare_del(ch, ptei, v); 431272840Smelifaro 432272840Smelifaro /* 433272840Smelifaro * Some syntax error (incorrect mask, or address, or 434272840Smelifaro * anything). Return error regardless of atomicity 435272840Smelifaro * settings. 436272840Smelifaro */ 437272840Smelifaro if (error != 0) 438272840Smelifaro break; 439272840Smelifaro } 440272840Smelifaro 441272840Smelifaro *ta_buf = ta_buf_m; 442272840Smelifaro return (error); 443272840Smelifaro} 444272840Smelifaro 445272840Smelifaro/* 446272840Smelifaro * Flushes allocated state for each @count entries in @tei. 447272840Smelifaro * Frees @ta_buf_m if differs from stack buffer @ta_buf. 448272840Smelifaro */ 449272840Smelifarostatic void 450272840Smelifaroflush_batch_buffer(struct ip_fw_chain *ch, struct table_algo *ta, 451272840Smelifaro struct tentry_info *tei, uint32_t count, int rollback, 452272840Smelifaro caddr_t ta_buf_m, caddr_t ta_buf) 453272840Smelifaro{ 454272840Smelifaro caddr_t v; 455272840Smelifaro struct tentry_info *ptei; 456272840Smelifaro size_t ta_buf_sz; 457272840Smelifaro int i; 458272840Smelifaro 459272840Smelifaro ta_buf_sz = ta->ta_buf_size; 460272840Smelifaro 461272840Smelifaro /* Run cleaning callback anyway */ 462272840Smelifaro v = ta_buf_m; 463272840Smelifaro for (i = 0; i < count; i++, v += ta_buf_sz) { 464272840Smelifaro ptei = &tei[i]; 465272840Smelifaro ta->flush_entry(ch, ptei, v); 466272840Smelifaro if (ptei->ptv != NULL) { 467272840Smelifaro free(ptei->ptv, M_IPFW); 468272840Smelifaro ptei->ptv = NULL; 469272840Smelifaro } 470272840Smelifaro } 471272840Smelifaro 472272840Smelifaro /* Clean up "deleted" state in case of rollback */ 473272840Smelifaro if (rollback != 0) { 474272840Smelifaro v = ta_buf_m + count * ta_buf_sz; 475272840Smelifaro for (i = 0; i < count; i++, v += ta_buf_sz) 476272840Smelifaro ta->flush_entry(ch, &tei[i], v); 477272840Smelifaro } 478272840Smelifaro 479272840Smelifaro if (ta_buf_m != ta_buf) 480272840Smelifaro free(ta_buf_m, M_TEMP); 481272840Smelifaro} 482272840Smelifaro 483272840Smelifaro 484272840Smelifarostatic void 485272840Smelifarorollback_add_entry(void *object, struct op_state *_state) 486272840Smelifaro{ 487272840Smelifaro struct ip_fw_chain *ch; 488272840Smelifaro struct tableop_state *ts; 489272840Smelifaro 490272840Smelifaro ts = (struct tableop_state *)_state; 491272840Smelifaro 492272840Smelifaro if (ts->tc != object && ts->ch != object) 493272840Smelifaro return; 494272840Smelifaro 495272840Smelifaro ch = ts->ch; 496272840Smelifaro 497272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 498272840Smelifaro 499272840Smelifaro /* Call specifid unlockers */ 500272840Smelifaro rollback_table_values(ts); 501272840Smelifaro 502272840Smelifaro /* Indicate we've called */ 503272840Smelifaro ts->modified = 1; 504272840Smelifaro} 505272840Smelifaro 506272840Smelifaro/* 507272840Smelifaro * Adds/updates one or more entries in table @ti. 508272840Smelifaro * 509272840Smelifaro * Function may drop/reacquire UH wlock multiple times due to 510272840Smelifaro * items alloc, algorithm callbacks (check_space), value linkage 511272840Smelifaro * (new values, value storage realloc), etc.. 512272840Smelifaro * Other processes like other adds (which may involve storage resize), 513272840Smelifaro * table swaps (which changes table data and may change algo type), 514272840Smelifaro * table modify (which may change value mask) may be executed 515272840Smelifaro * simultaneously so we need to deal with it. 516272840Smelifaro * 517272840Smelifaro * The following approach was implemented: 518272840Smelifaro * we have per-chain linked list, protected with UH lock. 519272840Smelifaro * add_table_entry prepares special on-stack structure wthich is passed 520272840Smelifaro * to its descendants. Users add this structure to this list before unlock. 521272840Smelifaro * After performing needed operations and acquiring UH lock back, each user 522272840Smelifaro * checks if structure has changed. If true, it rolls local state back and 523272840Smelifaro * returns without error to the caller. 524272840Smelifaro * add_table_entry() on its own checks if structure has changed and restarts 525272840Smelifaro * its operation from the beginning (goto restart). 526272840Smelifaro * 527272840Smelifaro * Functions which are modifying fields of interest (currently 528272840Smelifaro * resize_shared_value_storage() and swap_tables() ) 529272840Smelifaro * traverses given list while holding UH lock immediately before 530272840Smelifaro * performing their operations calling function provided be list entry 531272840Smelifaro * ( currently rollback_add_entry ) which performs rollback for all necessary 532272840Smelifaro * state and sets appropriate values in structure indicating rollback 533272840Smelifaro * has happened. 534272840Smelifaro * 535272840Smelifaro * Algo interaction: 536272840Smelifaro * Function references @ti first to ensure table won't 537272840Smelifaro * disappear or change its type. 538272840Smelifaro * After that, prepare_add callback is called for each @tei entry. 539272840Smelifaro * Next, we try to add each entry under UH+WHLOCK 540272840Smelifaro * using add() callback. 541272840Smelifaro * Finally, we free all state by calling flush_entry callback 542272840Smelifaro * for each @tei. 543272840Smelifaro * 544272840Smelifaro * Returns 0 on success. 545272840Smelifaro */ 546272840Smelifaroint 547272840Smelifaroadd_table_entry(struct ip_fw_chain *ch, struct tid_info *ti, 548272840Smelifaro struct tentry_info *tei, uint8_t flags, uint32_t count) 549272840Smelifaro{ 550272840Smelifaro struct table_config *tc; 551272840Smelifaro struct table_algo *ta; 552272840Smelifaro uint16_t kidx; 553272840Smelifaro int error, first_error, i, rollback; 554272840Smelifaro uint32_t num, numadd; 555272840Smelifaro struct tentry_info *ptei; 556272840Smelifaro struct tableop_state ts; 557272840Smelifaro char ta_buf[TA_BUF_SZ]; 558272840Smelifaro caddr_t ta_buf_m, v; 559272840Smelifaro 560272840Smelifaro memset(&ts, 0, sizeof(ts)); 561272840Smelifaro ta = NULL; 562272840Smelifaro IPFW_UH_WLOCK(ch); 563272840Smelifaro 564272840Smelifaro /* 565272840Smelifaro * Find and reference existing table. 566272840Smelifaro */ 567272840Smelifarorestart: 568272840Smelifaro if (ts.modified != 0) { 569272840Smelifaro IPFW_UH_WUNLOCK(ch); 570272840Smelifaro flush_batch_buffer(ch, ta, tei, count, rollback, 571272840Smelifaro ta_buf_m, ta_buf); 572272840Smelifaro memset(&ts, 0, sizeof(ts)); 573272840Smelifaro ta = NULL; 574272840Smelifaro IPFW_UH_WLOCK(ch); 575272840Smelifaro } 576272840Smelifaro 577272840Smelifaro error = find_ref_table(ch, ti, tei, count, OP_ADD, &tc); 578272840Smelifaro if (error != 0) { 579272840Smelifaro IPFW_UH_WUNLOCK(ch); 580272840Smelifaro return (error); 581272840Smelifaro } 582272840Smelifaro ta = tc->ta; 583272840Smelifaro 584272840Smelifaro /* Fill in tablestate */ 585272840Smelifaro ts.ch = ch; 586272840Smelifaro ts.opstate.func = rollback_add_entry; 587272840Smelifaro ts.tc = tc; 588272840Smelifaro ts.vshared = tc->vshared; 589272840Smelifaro ts.vmask = tc->vmask; 590272840Smelifaro ts.ta = ta; 591272840Smelifaro ts.tei = tei; 592272840Smelifaro ts.count = count; 593272840Smelifaro rollback = 0; 594272840Smelifaro add_toperation_state(ch, &ts); 595272840Smelifaro IPFW_UH_WUNLOCK(ch); 596272840Smelifaro 597272840Smelifaro /* Allocate memory and prepare record(s) */ 598272840Smelifaro /* Pass stack buffer by default */ 599272840Smelifaro ta_buf_m = ta_buf; 600272840Smelifaro error = prepare_batch_buffer(ch, ta, tei, count, OP_ADD, &ta_buf_m); 601272840Smelifaro 602272840Smelifaro IPFW_UH_WLOCK(ch); 603282521Smelifaro del_toperation_state(ch, &ts); 604272840Smelifaro /* Drop reference we've used in first search */ 605272840Smelifaro tc->no.refcnt--; 606272840Smelifaro 607282521Smelifaro /* Check prepare_batch_buffer() error */ 608282521Smelifaro if (error != 0) 609282521Smelifaro goto cleanup; 610282521Smelifaro 611272840Smelifaro /* 612272840Smelifaro * Check if table swap has happened. 613272840Smelifaro * (so table algo might be changed). 614272840Smelifaro * Restart operation to achieve consistent behavior. 615272840Smelifaro */ 616272840Smelifaro if (ts.modified != 0) 617272840Smelifaro goto restart; 618272840Smelifaro 619272840Smelifaro /* 620272840Smelifaro * Link all values values to shared/per-table value array. 621272840Smelifaro * 622272840Smelifaro * May release/reacquire UH_WLOCK. 623272840Smelifaro */ 624272840Smelifaro error = ipfw_link_table_values(ch, &ts); 625272840Smelifaro if (error != 0) 626272840Smelifaro goto cleanup; 627272840Smelifaro if (ts.modified != 0) 628272840Smelifaro goto restart; 629272840Smelifaro 630272840Smelifaro /* 631272840Smelifaro * Ensure we are able to add all entries without additional 632272840Smelifaro * memory allocations. May release/reacquire UH_WLOCK. 633272840Smelifaro */ 634272840Smelifaro kidx = tc->no.kidx; 635272840Smelifaro error = check_table_space(ch, &ts, tc, KIDX_TO_TI(ch, kidx), count); 636272840Smelifaro if (error != 0) 637272840Smelifaro goto cleanup; 638272840Smelifaro if (ts.modified != 0) 639272840Smelifaro goto restart; 640272840Smelifaro 641272840Smelifaro /* We've got valid table in @tc. Let's try to add data */ 642272840Smelifaro kidx = tc->no.kidx; 643272840Smelifaro ta = tc->ta; 644272840Smelifaro numadd = 0; 645272840Smelifaro first_error = 0; 646272840Smelifaro 647272840Smelifaro IPFW_WLOCK(ch); 648272840Smelifaro 649272840Smelifaro v = ta_buf_m; 650272840Smelifaro for (i = 0; i < count; i++, v += ta->ta_buf_size) { 651272840Smelifaro ptei = &tei[i]; 652272840Smelifaro num = 0; 653272840Smelifaro /* check limit before adding */ 654272840Smelifaro if ((error = check_table_limit(tc, ptei)) == 0) { 655272840Smelifaro error = ta->add(tc->astate, KIDX_TO_TI(ch, kidx), 656272840Smelifaro ptei, v, &num); 657272840Smelifaro /* Set status flag to inform userland */ 658272840Smelifaro store_tei_result(ptei, OP_ADD, error, num); 659272840Smelifaro } 660272840Smelifaro if (error == 0) { 661272840Smelifaro /* Update number of records to ease limit checking */ 662272840Smelifaro tc->count += num; 663272840Smelifaro numadd += num; 664272840Smelifaro continue; 665272840Smelifaro } 666272840Smelifaro 667272840Smelifaro if (first_error == 0) 668272840Smelifaro first_error = error; 669272840Smelifaro 670272840Smelifaro /* 671272840Smelifaro * Some error have happened. Check our atomicity 672272840Smelifaro * settings: continue if atomicity is not required, 673272840Smelifaro * rollback changes otherwise. 674272840Smelifaro */ 675272840Smelifaro if ((flags & IPFW_CTF_ATOMIC) == 0) 676272840Smelifaro continue; 677272840Smelifaro 678272840Smelifaro rollback_added_entries(ch, tc, KIDX_TO_TI(ch, kidx), 679272840Smelifaro tei, ta_buf_m, count, i); 680272840Smelifaro 681272840Smelifaro rollback = 1; 682232865Smelifaro break; 683272840Smelifaro } 684272840Smelifaro 685272840Smelifaro IPFW_WUNLOCK(ch); 686272840Smelifaro 687272840Smelifaro ipfw_garbage_table_values(ch, tc, tei, count, rollback); 688272840Smelifaro 689272840Smelifaro /* Permit post-add algorithm grow/rehash. */ 690272840Smelifaro if (numadd != 0) 691272840Smelifaro check_table_space(ch, NULL, tc, KIDX_TO_TI(ch, kidx), 0); 692272840Smelifaro 693272840Smelifaro /* Return first error to user, if any */ 694272840Smelifaro error = first_error; 695272840Smelifaro 696272840Smelifarocleanup: 697272840Smelifaro IPFW_UH_WUNLOCK(ch); 698272840Smelifaro 699272840Smelifaro flush_batch_buffer(ch, ta, tei, count, rollback, ta_buf_m, ta_buf); 700232865Smelifaro 701272840Smelifaro return (error); 702272840Smelifaro} 703232865Smelifaro 704272840Smelifaro/* 705272840Smelifaro * Deletes one or more entries in table @ti. 706272840Smelifaro * 707272840Smelifaro * Returns 0 on success. 708272840Smelifaro */ 709272840Smelifaroint 710272840Smelifarodel_table_entry(struct ip_fw_chain *ch, struct tid_info *ti, 711272840Smelifaro struct tentry_info *tei, uint8_t flags, uint32_t count) 712272840Smelifaro{ 713272840Smelifaro struct table_config *tc; 714272840Smelifaro struct table_algo *ta; 715272840Smelifaro struct tentry_info *ptei; 716272840Smelifaro uint16_t kidx; 717272840Smelifaro int error, first_error, i; 718272840Smelifaro uint32_t num, numdel; 719272840Smelifaro char ta_buf[TA_BUF_SZ]; 720272840Smelifaro caddr_t ta_buf_m, v; 721232865Smelifaro 722272840Smelifaro /* 723272840Smelifaro * Find and reference existing table. 724272840Smelifaro */ 725272840Smelifaro IPFW_UH_WLOCK(ch); 726272840Smelifaro error = find_ref_table(ch, ti, tei, count, OP_DEL, &tc); 727272840Smelifaro if (error != 0) { 728272840Smelifaro IPFW_UH_WUNLOCK(ch); 729272840Smelifaro return (error); 730272840Smelifaro } 731272840Smelifaro ta = tc->ta; 732272840Smelifaro IPFW_UH_WUNLOCK(ch); 733232865Smelifaro 734272840Smelifaro /* Allocate memory and prepare record(s) */ 735272840Smelifaro /* Pass stack buffer by default */ 736272840Smelifaro ta_buf_m = ta_buf; 737272840Smelifaro error = prepare_batch_buffer(ch, ta, tei, count, OP_DEL, &ta_buf_m); 738272840Smelifaro if (error != 0) 739272840Smelifaro goto cleanup; 740272840Smelifaro 741272840Smelifaro IPFW_UH_WLOCK(ch); 742272840Smelifaro 743272840Smelifaro /* Drop reference we've used in first search */ 744272840Smelifaro tc->no.refcnt--; 745272840Smelifaro 746272840Smelifaro /* 747272840Smelifaro * Check if table algo is still the same. 748272840Smelifaro * (changed ta may be the result of table swap). 749272840Smelifaro */ 750272840Smelifaro if (ta != tc->ta) { 751272840Smelifaro IPFW_UH_WUNLOCK(ch); 752272840Smelifaro error = EINVAL; 753272840Smelifaro goto cleanup; 754232865Smelifaro } 755232865Smelifaro 756272840Smelifaro kidx = tc->no.kidx; 757272840Smelifaro numdel = 0; 758272840Smelifaro first_error = 0; 759272840Smelifaro 760200590Sluigi IPFW_WLOCK(ch); 761272840Smelifaro v = ta_buf_m; 762272840Smelifaro for (i = 0; i < count; i++, v += ta->ta_buf_size) { 763272840Smelifaro ptei = &tei[i]; 764272840Smelifaro num = 0; 765272840Smelifaro error = ta->del(tc->astate, KIDX_TO_TI(ch, kidx), ptei, v, 766272840Smelifaro &num); 767272840Smelifaro /* Save state for userland */ 768272840Smelifaro store_tei_result(ptei, OP_DEL, error, num); 769272840Smelifaro if (error != 0 && first_error == 0) 770272840Smelifaro first_error = error; 771272840Smelifaro tc->count -= num; 772272840Smelifaro numdel += num; 773272840Smelifaro } 774272840Smelifaro IPFW_WUNLOCK(ch); 775232865Smelifaro 776272840Smelifaro /* Unlink non-used values */ 777272840Smelifaro ipfw_garbage_table_values(ch, tc, tei, count, 0); 778272840Smelifaro 779272840Smelifaro if (numdel != 0) { 780272840Smelifaro /* Run post-del hook to permit shrinking */ 781272840Smelifaro check_table_space(ch, NULL, tc, KIDX_TO_TI(ch, kidx), 0); 782232865Smelifaro } 783232865Smelifaro 784272840Smelifaro IPFW_UH_WUNLOCK(ch); 785272840Smelifaro 786272840Smelifaro /* Return first error to user, if any */ 787272840Smelifaro error = first_error; 788272840Smelifaro 789272840Smelifarocleanup: 790272840Smelifaro flush_batch_buffer(ch, ta, tei, count, 0, ta_buf_m, ta_buf); 791272840Smelifaro 792272840Smelifaro return (error); 793272840Smelifaro} 794272840Smelifaro 795272840Smelifaro/* 796272840Smelifaro * Ensure that table @tc has enough space to add @count entries without 797272840Smelifaro * need for reallocation. 798272840Smelifaro * 799272840Smelifaro * Callbacks order: 800272840Smelifaro * 0) need_modify() (UH_WLOCK) - checks if @count items can be added w/o resize. 801272840Smelifaro * 802272840Smelifaro * 1) alloc_modify (no locks, M_WAITOK) - alloc new state based on @pflags. 803272840Smelifaro * 2) prepare_modifyt (UH_WLOCK) - copy old data into new storage 804272840Smelifaro * 3) modify (UH_WLOCK + WLOCK) - switch pointers 805272840Smelifaro * 4) flush_modify (UH_WLOCK) - free state, if needed 806272840Smelifaro * 807272840Smelifaro * Returns 0 on success. 808272840Smelifaro */ 809272840Smelifarostatic int 810272840Smelifarocheck_table_space(struct ip_fw_chain *ch, struct tableop_state *ts, 811272840Smelifaro struct table_config *tc, struct table_info *ti, uint32_t count) 812272840Smelifaro{ 813272840Smelifaro struct table_algo *ta; 814272840Smelifaro uint64_t pflags; 815272840Smelifaro char ta_buf[TA_BUF_SZ]; 816272840Smelifaro int error; 817272840Smelifaro 818272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 819272840Smelifaro 820272840Smelifaro error = 0; 821272840Smelifaro ta = tc->ta; 822272840Smelifaro if (ta->need_modify == NULL) 823272840Smelifaro return (0); 824272840Smelifaro 825272840Smelifaro /* Acquire reference not to loose @tc between locks/unlocks */ 826272840Smelifaro tc->no.refcnt++; 827272840Smelifaro 828272840Smelifaro /* 829272840Smelifaro * TODO: think about avoiding race between large add/large delete 830272840Smelifaro * operation on algorithm which implements shrinking along with 831272840Smelifaro * growing. 832272840Smelifaro */ 833272840Smelifaro while (true) { 834272840Smelifaro pflags = 0; 835272840Smelifaro if (ta->need_modify(tc->astate, ti, count, &pflags) == 0) { 836272840Smelifaro error = 0; 837272840Smelifaro break; 838232865Smelifaro } 839232865Smelifaro 840272840Smelifaro /* We have to shrink/grow table */ 841272840Smelifaro if (ts != NULL) 842272840Smelifaro add_toperation_state(ch, ts); 843272840Smelifaro IPFW_UH_WUNLOCK(ch); 844272840Smelifaro 845272840Smelifaro memset(&ta_buf, 0, sizeof(ta_buf)); 846272840Smelifaro error = ta->prepare_mod(ta_buf, &pflags); 847272840Smelifaro 848272840Smelifaro IPFW_UH_WLOCK(ch); 849272840Smelifaro if (ts != NULL) 850272840Smelifaro del_toperation_state(ch, ts); 851272840Smelifaro 852272840Smelifaro if (error != 0) 853272840Smelifaro break; 854272840Smelifaro 855272840Smelifaro if (ts != NULL && ts->modified != 0) { 856272840Smelifaro 857272840Smelifaro /* 858272840Smelifaro * Swap operation has happened 859272840Smelifaro * so we're currently operating on other 860272840Smelifaro * table data. Stop doing this. 861232865Smelifaro */ 862272840Smelifaro ta->flush_mod(ta_buf); 863272840Smelifaro break; 864232865Smelifaro } 865272840Smelifaro 866272840Smelifaro /* Check if we still need to alter table */ 867272840Smelifaro ti = KIDX_TO_TI(ch, tc->no.kidx); 868272840Smelifaro if (ta->need_modify(tc->astate, ti, count, &pflags) == 0) { 869272840Smelifaro IPFW_UH_WUNLOCK(ch); 870272840Smelifaro 871272840Smelifaro /* 872272840Smelifaro * Other thread has already performed resize. 873272840Smelifaro * Flush our state and return. 874272840Smelifaro */ 875272840Smelifaro ta->flush_mod(ta_buf); 876272840Smelifaro break; 877272840Smelifaro } 878272840Smelifaro 879272840Smelifaro error = ta->fill_mod(tc->astate, ti, ta_buf, &pflags); 880272840Smelifaro if (error == 0) { 881272840Smelifaro /* Do actual modification */ 882272840Smelifaro IPFW_WLOCK(ch); 883272840Smelifaro ta->modify(tc->astate, ti, ta_buf, pflags); 884272840Smelifaro IPFW_WUNLOCK(ch); 885272840Smelifaro } 886272840Smelifaro 887272840Smelifaro /* Anyway, flush data and retry */ 888272840Smelifaro ta->flush_mod(ta_buf); 889232865Smelifaro } 890232865Smelifaro 891272840Smelifaro tc->no.refcnt--; 892272840Smelifaro return (error); 893272840Smelifaro} 894232865Smelifaro 895272840Smelifaro/* 896272840Smelifaro * Adds or deletes record in table. 897272840Smelifaro * Data layout (v0): 898272840Smelifaro * Request: [ ip_fw3_opheader ipfw_table_xentry ] 899272840Smelifaro * 900272840Smelifaro * Returns 0 on success 901272840Smelifaro */ 902272840Smelifarostatic int 903272840Smelifaromanage_table_ent_v0(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 904272840Smelifaro struct sockopt_data *sd) 905272840Smelifaro{ 906272840Smelifaro ipfw_table_xentry *xent; 907272840Smelifaro struct tentry_info tei; 908272840Smelifaro struct tid_info ti; 909272840Smelifaro struct table_value v; 910272840Smelifaro int error, hdrlen, read; 911272840Smelifaro 912272840Smelifaro hdrlen = offsetof(ipfw_table_xentry, k); 913272840Smelifaro 914272840Smelifaro /* Check minimum header size */ 915272840Smelifaro if (sd->valsize < (sizeof(*op3) + hdrlen)) 916272840Smelifaro return (EINVAL); 917272840Smelifaro 918272840Smelifaro read = sizeof(ip_fw3_opheader); 919272840Smelifaro 920272840Smelifaro /* Check if xentry len field is valid */ 921272840Smelifaro xent = (ipfw_table_xentry *)(op3 + 1); 922272840Smelifaro if (xent->len < hdrlen || xent->len + read > sd->valsize) 923272840Smelifaro return (EINVAL); 924272840Smelifaro 925272840Smelifaro memset(&tei, 0, sizeof(tei)); 926272840Smelifaro tei.paddr = &xent->k; 927272840Smelifaro tei.masklen = xent->masklen; 928272840Smelifaro ipfw_import_table_value_legacy(xent->value, &v); 929272840Smelifaro tei.pvalue = &v; 930272840Smelifaro /* Old requests compability */ 931272840Smelifaro tei.flags = TEI_FLAGS_COMPAT; 932272840Smelifaro if (xent->type == IPFW_TABLE_ADDR) { 933272840Smelifaro if (xent->len - hdrlen == sizeof(in_addr_t)) 934272840Smelifaro tei.subtype = AF_INET; 935272840Smelifaro else 936272840Smelifaro tei.subtype = AF_INET6; 937200590Sluigi } 938272840Smelifaro 939272840Smelifaro memset(&ti, 0, sizeof(ti)); 940272840Smelifaro ti.uidx = xent->tbl; 941272840Smelifaro ti.type = xent->type; 942272840Smelifaro 943272840Smelifaro error = (op3->opcode == IP_FW_TABLE_XADD) ? 944272840Smelifaro add_table_entry(ch, &ti, &tei, 0, 1) : 945272840Smelifaro del_table_entry(ch, &ti, &tei, 0, 1); 946272840Smelifaro 947272840Smelifaro return (error); 948200590Sluigi} 949200590Sluigi 950272840Smelifaro/* 951272840Smelifaro * Adds or deletes record in table. 952272840Smelifaro * Data layout (v1)(current): 953272840Smelifaro * Request: [ ipfw_obj_header 954272840Smelifaro * ipfw_obj_ctlv(IPFW_TLV_TBLENT_LIST) [ ipfw_obj_tentry x N ] 955272840Smelifaro * ] 956272840Smelifaro * 957272840Smelifaro * Returns 0 on success 958272840Smelifaro */ 959272840Smelifarostatic int 960272840Smelifaromanage_table_ent_v1(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 961272840Smelifaro struct sockopt_data *sd) 962200590Sluigi{ 963272840Smelifaro ipfw_obj_tentry *tent, *ptent; 964272840Smelifaro ipfw_obj_ctlv *ctlv; 965272840Smelifaro ipfw_obj_header *oh; 966272840Smelifaro struct tentry_info *ptei, tei, *tei_buf; 967272840Smelifaro struct tid_info ti; 968272840Smelifaro int error, i, kidx, read; 969200590Sluigi 970272840Smelifaro /* Check minimum header size */ 971272840Smelifaro if (sd->valsize < (sizeof(*oh) + sizeof(*ctlv))) 972200590Sluigi return (EINVAL); 973232865Smelifaro 974272840Smelifaro /* Check if passed data is too long */ 975272840Smelifaro if (sd->valsize != sd->kavail) 976272840Smelifaro return (EINVAL); 977232865Smelifaro 978272840Smelifaro oh = (ipfw_obj_header *)sd->kbuf; 979272840Smelifaro 980272840Smelifaro /* Basic length checks for TLVs */ 981272840Smelifaro if (oh->ntlv.head.length != sizeof(oh->ntlv)) 982272840Smelifaro return (EINVAL); 983272840Smelifaro 984272840Smelifaro read = sizeof(*oh); 985272840Smelifaro 986272840Smelifaro ctlv = (ipfw_obj_ctlv *)(oh + 1); 987272840Smelifaro if (ctlv->head.length + read != sd->valsize) 988272840Smelifaro return (EINVAL); 989272840Smelifaro 990272840Smelifaro read += sizeof(*ctlv); 991272840Smelifaro tent = (ipfw_obj_tentry *)(ctlv + 1); 992272840Smelifaro if (ctlv->count * sizeof(*tent) + read != sd->valsize) 993272840Smelifaro return (EINVAL); 994272840Smelifaro 995272840Smelifaro if (ctlv->count == 0) 996272840Smelifaro return (0); 997272840Smelifaro 998272840Smelifaro /* 999272840Smelifaro * Mark entire buffer as "read". 1000272840Smelifaro * This instructs sopt api write it back 1001272840Smelifaro * after function return. 1002272840Smelifaro */ 1003272840Smelifaro ipfw_get_sopt_header(sd, sd->valsize); 1004272840Smelifaro 1005272840Smelifaro /* Perform basic checks for each entry */ 1006272840Smelifaro ptent = tent; 1007272840Smelifaro kidx = tent->idx; 1008272840Smelifaro for (i = 0; i < ctlv->count; i++, ptent++) { 1009272840Smelifaro if (ptent->head.length != sizeof(*ptent)) 1010232865Smelifaro return (EINVAL); 1011272840Smelifaro if (ptent->idx != kidx) 1012272840Smelifaro return (ENOTSUP); 1013272840Smelifaro } 1014232865Smelifaro 1015272840Smelifaro /* Convert data into kernel request objects */ 1016272840Smelifaro objheader_to_ti(oh, &ti); 1017272840Smelifaro ti.type = oh->ntlv.type; 1018272840Smelifaro ti.uidx = kidx; 1019232865Smelifaro 1020272840Smelifaro /* Use on-stack buffer for single add/del */ 1021272840Smelifaro if (ctlv->count == 1) { 1022272840Smelifaro memset(&tei, 0, sizeof(tei)); 1023272840Smelifaro tei_buf = &tei; 1024272840Smelifaro } else 1025272840Smelifaro tei_buf = malloc(ctlv->count * sizeof(tei), M_TEMP, 1026272840Smelifaro M_WAITOK | M_ZERO); 1027238265Smelifaro 1028272840Smelifaro ptei = tei_buf; 1029272840Smelifaro ptent = tent; 1030272840Smelifaro for (i = 0; i < ctlv->count; i++, ptent++, ptei++) { 1031272840Smelifaro ptei->paddr = &ptent->k; 1032272840Smelifaro ptei->subtype = ptent->subtype; 1033272840Smelifaro ptei->masklen = ptent->masklen; 1034272840Smelifaro if (ptent->head.flags & IPFW_TF_UPDATE) 1035272840Smelifaro ptei->flags |= TEI_FLAGS_UPDATE; 1036232865Smelifaro 1037272840Smelifaro ipfw_import_table_value_v1(&ptent->v.value); 1038272840Smelifaro ptei->pvalue = (struct table_value *)&ptent->v.value; 1039272840Smelifaro } 1040232865Smelifaro 1041272840Smelifaro error = (oh->opheader.opcode == IP_FW_TABLE_XADD) ? 1042272840Smelifaro add_table_entry(ch, &ti, tei_buf, ctlv->flags, ctlv->count) : 1043272840Smelifaro del_table_entry(ch, &ti, tei_buf, ctlv->flags, ctlv->count); 1044272840Smelifaro 1045272840Smelifaro /* Translate result back to userland */ 1046272840Smelifaro ptei = tei_buf; 1047272840Smelifaro ptent = tent; 1048272840Smelifaro for (i = 0; i < ctlv->count; i++, ptent++, ptei++) { 1049272840Smelifaro if (ptei->flags & TEI_FLAGS_ADDED) 1050272840Smelifaro ptent->result = IPFW_TR_ADDED; 1051272840Smelifaro else if (ptei->flags & TEI_FLAGS_DELETED) 1052272840Smelifaro ptent->result = IPFW_TR_DELETED; 1053272840Smelifaro else if (ptei->flags & TEI_FLAGS_UPDATED) 1054272840Smelifaro ptent->result = IPFW_TR_UPDATED; 1055272840Smelifaro else if (ptei->flags & TEI_FLAGS_LIMIT) 1056272840Smelifaro ptent->result = IPFW_TR_LIMIT; 1057272840Smelifaro else if (ptei->flags & TEI_FLAGS_ERROR) 1058272840Smelifaro ptent->result = IPFW_TR_ERROR; 1059272840Smelifaro else if (ptei->flags & TEI_FLAGS_NOTFOUND) 1060272840Smelifaro ptent->result = IPFW_TR_NOTFOUND; 1061272840Smelifaro else if (ptei->flags & TEI_FLAGS_EXISTS) 1062272840Smelifaro ptent->result = IPFW_TR_EXISTS; 1063272840Smelifaro ipfw_export_table_value_v1(ptei->pvalue, &ptent->v.value); 1064232865Smelifaro } 1065232865Smelifaro 1066272840Smelifaro if (tei_buf != &tei) 1067272840Smelifaro free(tei_buf, M_TEMP); 1068272840Smelifaro 1069272840Smelifaro return (error); 1070272840Smelifaro} 1071272840Smelifaro 1072272840Smelifaro/* 1073272840Smelifaro * Looks up an entry in given table. 1074272840Smelifaro * Data layout (v0)(current): 1075272840Smelifaro * Request: [ ipfw_obj_header ipfw_obj_tentry ] 1076272840Smelifaro * Reply: [ ipfw_obj_header ipfw_obj_tentry ] 1077272840Smelifaro * 1078272840Smelifaro * Returns 0 on success 1079272840Smelifaro */ 1080272840Smelifarostatic int 1081272840Smelifarofind_table_entry(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1082272840Smelifaro struct sockopt_data *sd) 1083272840Smelifaro{ 1084272840Smelifaro ipfw_obj_tentry *tent; 1085272840Smelifaro ipfw_obj_header *oh; 1086272840Smelifaro struct tid_info ti; 1087272840Smelifaro struct table_config *tc; 1088272840Smelifaro struct table_algo *ta; 1089272840Smelifaro struct table_info *kti; 1090272840Smelifaro struct namedobj_instance *ni; 1091272840Smelifaro int error; 1092272840Smelifaro size_t sz; 1093272840Smelifaro 1094272840Smelifaro /* Check minimum header size */ 1095272840Smelifaro sz = sizeof(*oh) + sizeof(*tent); 1096272840Smelifaro if (sd->valsize != sz) 1097272840Smelifaro return (EINVAL); 1098272840Smelifaro 1099272840Smelifaro oh = (struct _ipfw_obj_header *)ipfw_get_sopt_header(sd, sz); 1100272840Smelifaro tent = (ipfw_obj_tentry *)(oh + 1); 1101272840Smelifaro 1102272840Smelifaro /* Basic length checks for TLVs */ 1103272840Smelifaro if (oh->ntlv.head.length != sizeof(oh->ntlv)) 1104272840Smelifaro return (EINVAL); 1105272840Smelifaro 1106272840Smelifaro objheader_to_ti(oh, &ti); 1107272840Smelifaro ti.type = oh->ntlv.type; 1108272840Smelifaro ti.uidx = tent->idx; 1109272840Smelifaro 1110272840Smelifaro IPFW_UH_RLOCK(ch); 1111272840Smelifaro ni = CHAIN_TO_NI(ch); 1112272840Smelifaro 1113272840Smelifaro /* 1114272840Smelifaro * Find existing table and check its type . 1115272840Smelifaro */ 1116272840Smelifaro ta = NULL; 1117272840Smelifaro if ((tc = find_table(ni, &ti)) == NULL) { 1118272840Smelifaro IPFW_UH_RUNLOCK(ch); 1119200590Sluigi return (ESRCH); 1120200590Sluigi } 1121232865Smelifaro 1122272840Smelifaro /* check table type */ 1123282070Smelifaro if (tc->no.subtype != ti.type) { 1124272840Smelifaro IPFW_UH_RUNLOCK(ch); 1125232865Smelifaro return (EINVAL); 1126232865Smelifaro } 1127232865Smelifaro 1128272840Smelifaro kti = KIDX_TO_TI(ch, tc->no.kidx); 1129272840Smelifaro ta = tc->ta; 1130232865Smelifaro 1131272840Smelifaro if (ta->find_tentry == NULL) 1132272840Smelifaro return (ENOTSUP); 1133232865Smelifaro 1134272840Smelifaro error = ta->find_tentry(tc->astate, kti, tent); 1135272840Smelifaro 1136272840Smelifaro IPFW_UH_RUNLOCK(ch); 1137272840Smelifaro 1138272840Smelifaro return (error); 1139200590Sluigi} 1140200590Sluigi 1141272840Smelifaro/* 1142272840Smelifaro * Flushes all entries or destroys given table. 1143272840Smelifaro * Data layout (v0)(current): 1144272840Smelifaro * Request: [ ipfw_obj_header ] 1145272840Smelifaro * 1146272840Smelifaro * Returns 0 on success 1147272840Smelifaro */ 1148200590Sluigistatic int 1149272840Smelifaroflush_table_v0(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1150272840Smelifaro struct sockopt_data *sd) 1151200590Sluigi{ 1152272840Smelifaro int error; 1153272840Smelifaro struct _ipfw_obj_header *oh; 1154272840Smelifaro struct tid_info ti; 1155200590Sluigi 1156272840Smelifaro if (sd->valsize != sizeof(*oh)) 1157272840Smelifaro return (EINVAL); 1158272840Smelifaro 1159272840Smelifaro oh = (struct _ipfw_obj_header *)op3; 1160272840Smelifaro objheader_to_ti(oh, &ti); 1161272840Smelifaro 1162272840Smelifaro if (op3->opcode == IP_FW_TABLE_XDESTROY) 1163272840Smelifaro error = destroy_table(ch, &ti); 1164272840Smelifaro else if (op3->opcode == IP_FW_TABLE_XFLUSH) 1165272840Smelifaro error = flush_table(ch, &ti); 1166272840Smelifaro else 1167272840Smelifaro return (ENOTSUP); 1168272840Smelifaro 1169272840Smelifaro return (error); 1170200590Sluigi} 1171200590Sluigi 1172272840Smelifarostatic void 1173272840Smelifarorestart_flush(void *object, struct op_state *_state) 1174272840Smelifaro{ 1175272840Smelifaro struct tableop_state *ts; 1176272840Smelifaro 1177272840Smelifaro ts = (struct tableop_state *)_state; 1178272840Smelifaro 1179272840Smelifaro if (ts->tc != object) 1180272840Smelifaro return; 1181272840Smelifaro 1182272840Smelifaro /* Indicate we've called */ 1183272840Smelifaro ts->modified = 1; 1184272840Smelifaro} 1185272840Smelifaro 1186272840Smelifaro/* 1187272840Smelifaro * Flushes given table. 1188272840Smelifaro * 1189272840Smelifaro * Function create new table instance with the same 1190272840Smelifaro * parameters, swaps it with old one and 1191272840Smelifaro * flushes state without holding runtime WLOCK. 1192272840Smelifaro * 1193272840Smelifaro * Returns 0 on success. 1194272840Smelifaro */ 1195200590Sluigiint 1196272840Smelifaroflush_table(struct ip_fw_chain *ch, struct tid_info *ti) 1197200590Sluigi{ 1198272840Smelifaro struct namedobj_instance *ni; 1199272840Smelifaro struct table_config *tc; 1200272840Smelifaro struct table_algo *ta; 1201272840Smelifaro struct table_info ti_old, ti_new, *tablestate; 1202272840Smelifaro void *astate_old, *astate_new; 1203272840Smelifaro char algostate[64], *pstate; 1204272840Smelifaro struct tableop_state ts; 1205278259Smelifaro int error, need_gc; 1206272840Smelifaro uint16_t kidx; 1207272840Smelifaro uint8_t tflags; 1208200590Sluigi 1209272840Smelifaro /* 1210272840Smelifaro * Stage 1: save table algoritm. 1211272840Smelifaro * Reference found table to ensure it won't disappear. 1212272840Smelifaro */ 1213272840Smelifaro IPFW_UH_WLOCK(ch); 1214272840Smelifaro ni = CHAIN_TO_NI(ch); 1215272840Smelifaro if ((tc = find_table(ni, ti)) == NULL) { 1216272840Smelifaro IPFW_UH_WUNLOCK(ch); 1217272840Smelifaro return (ESRCH); 1218272840Smelifaro } 1219278259Smelifaro need_gc = 0; 1220278259Smelifaro astate_new = NULL; 1221278259Smelifaro memset(&ti_new, 0, sizeof(ti_new)); 1222272840Smelifarorestart: 1223272840Smelifaro /* Set up swap handler */ 1224272840Smelifaro memset(&ts, 0, sizeof(ts)); 1225272840Smelifaro ts.opstate.func = restart_flush; 1226272840Smelifaro ts.tc = tc; 1227200590Sluigi 1228272840Smelifaro ta = tc->ta; 1229272840Smelifaro /* Do not flush readonly tables */ 1230272840Smelifaro if ((ta->flags & TA_FLAG_READONLY) != 0) { 1231272840Smelifaro IPFW_UH_WUNLOCK(ch); 1232272840Smelifaro return (EACCES); 1233272840Smelifaro } 1234272840Smelifaro /* Save startup algo parameters */ 1235272840Smelifaro if (ta->print_config != NULL) { 1236272840Smelifaro ta->print_config(tc->astate, KIDX_TO_TI(ch, tc->no.kidx), 1237272840Smelifaro algostate, sizeof(algostate)); 1238272840Smelifaro pstate = algostate; 1239272840Smelifaro } else 1240272840Smelifaro pstate = NULL; 1241272840Smelifaro tflags = tc->tflags; 1242272840Smelifaro tc->no.refcnt++; 1243272840Smelifaro add_toperation_state(ch, &ts); 1244272840Smelifaro IPFW_UH_WUNLOCK(ch); 1245272840Smelifaro 1246232865Smelifaro /* 1247278259Smelifaro * Stage 1.5: if this is not the first attempt, destroy previous state 1248278259Smelifaro */ 1249278259Smelifaro if (need_gc != 0) { 1250278259Smelifaro ta->destroy(astate_new, &ti_new); 1251278259Smelifaro need_gc = 0; 1252278259Smelifaro } 1253278259Smelifaro 1254278259Smelifaro /* 1255272840Smelifaro * Stage 2: allocate new table instance using same algo. 1256232865Smelifaro */ 1257272840Smelifaro memset(&ti_new, 0, sizeof(struct table_info)); 1258272840Smelifaro error = ta->init(ch, &astate_new, &ti_new, pstate, tflags); 1259232865Smelifaro 1260272840Smelifaro /* 1261272840Smelifaro * Stage 3: swap old state pointers with newly-allocated ones. 1262272840Smelifaro * Decrease refcount. 1263272840Smelifaro */ 1264272840Smelifaro IPFW_UH_WLOCK(ch); 1265272840Smelifaro tc->no.refcnt--; 1266272840Smelifaro del_toperation_state(ch, &ts); 1267232865Smelifaro 1268272840Smelifaro if (error != 0) { 1269272840Smelifaro IPFW_UH_WUNLOCK(ch); 1270272840Smelifaro return (error); 1271232865Smelifaro } 1272232865Smelifaro 1273272840Smelifaro /* 1274272840Smelifaro * Restart operation if table swap has happened: 1275272840Smelifaro * even if algo may be the same, algo init parameters 1276272840Smelifaro * may change. Restart operation instead of doing 1277272840Smelifaro * complex checks. 1278272840Smelifaro */ 1279272840Smelifaro if (ts.modified != 0) { 1280278259Smelifaro /* Delay destroying data since we're holding UH lock */ 1281278259Smelifaro need_gc = 1; 1282272840Smelifaro goto restart; 1283232865Smelifaro } 1284232865Smelifaro 1285272840Smelifaro ni = CHAIN_TO_NI(ch); 1286272840Smelifaro kidx = tc->no.kidx; 1287272840Smelifaro tablestate = (struct table_info *)ch->tablestate; 1288272840Smelifaro 1289272840Smelifaro IPFW_WLOCK(ch); 1290272840Smelifaro ti_old = tablestate[kidx]; 1291272840Smelifaro tablestate[kidx] = ti_new; 1292272840Smelifaro IPFW_WUNLOCK(ch); 1293272840Smelifaro 1294272840Smelifaro astate_old = tc->astate; 1295272840Smelifaro tc->astate = astate_new; 1296272840Smelifaro tc->ti_copy = ti_new; 1297272840Smelifaro tc->count = 0; 1298272840Smelifaro 1299272840Smelifaro /* Notify algo on real @ti address */ 1300272840Smelifaro if (ta->change_ti != NULL) 1301272840Smelifaro ta->change_ti(tc->astate, &tablestate[kidx]); 1302272840Smelifaro 1303272840Smelifaro /* 1304272840Smelifaro * Stage 4: unref values. 1305272840Smelifaro */ 1306272840Smelifaro ipfw_unref_table_values(ch, tc, ta, astate_old, &ti_old); 1307272840Smelifaro IPFW_UH_WUNLOCK(ch); 1308272840Smelifaro 1309272840Smelifaro /* 1310272840Smelifaro * Stage 5: perform real flush/destroy. 1311272840Smelifaro */ 1312272840Smelifaro ta->destroy(astate_old, &ti_old); 1313272840Smelifaro 1314200590Sluigi return (0); 1315200590Sluigi} 1316200590Sluigi 1317272840Smelifaro/* 1318272840Smelifaro * Swaps two tables. 1319272840Smelifaro * Data layout (v0)(current): 1320272840Smelifaro * Request: [ ipfw_obj_header ipfw_obj_ntlv ] 1321272840Smelifaro * 1322272840Smelifaro * Returns 0 on success 1323272840Smelifaro */ 1324272840Smelifarostatic int 1325272840Smelifaroswap_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1326272840Smelifaro struct sockopt_data *sd) 1327200590Sluigi{ 1328272840Smelifaro int error; 1329272840Smelifaro struct _ipfw_obj_header *oh; 1330272840Smelifaro struct tid_info ti_a, ti_b; 1331200590Sluigi 1332272840Smelifaro if (sd->valsize != sizeof(*oh) + sizeof(ipfw_obj_ntlv)) 1333272840Smelifaro return (EINVAL); 1334200590Sluigi 1335272840Smelifaro oh = (struct _ipfw_obj_header *)op3; 1336272840Smelifaro ntlv_to_ti(&oh->ntlv, &ti_a); 1337272840Smelifaro ntlv_to_ti((ipfw_obj_ntlv *)(oh + 1), &ti_b); 1338272840Smelifaro 1339272840Smelifaro error = swap_tables(ch, &ti_a, &ti_b); 1340272840Smelifaro 1341272840Smelifaro return (error); 1342200590Sluigi} 1343200590Sluigi 1344272840Smelifaro/* 1345272840Smelifaro * Swaps two tables of the same type/valtype. 1346272840Smelifaro * 1347272840Smelifaro * Checks if tables are compatible and limits 1348272840Smelifaro * permits swap, than actually perform swap. 1349272840Smelifaro * 1350272840Smelifaro * Each table consists of 2 different parts: 1351272840Smelifaro * config: 1352272840Smelifaro * @tc (with name, set, kidx) and rule bindings, which is "stable". 1353272840Smelifaro * number of items 1354272840Smelifaro * table algo 1355272840Smelifaro * runtime: 1356272840Smelifaro * runtime data @ti (ch->tablestate) 1357272840Smelifaro * runtime cache in @tc 1358272840Smelifaro * algo-specific data (@tc->astate) 1359272840Smelifaro * 1360272840Smelifaro * So we switch: 1361272840Smelifaro * all runtime data 1362272840Smelifaro * number of items 1363272840Smelifaro * table algo 1364272840Smelifaro * 1365272840Smelifaro * After that we call @ti change handler for each table. 1366272840Smelifaro * 1367272840Smelifaro * Note that referencing @tc won't protect tc->ta from change. 1368272840Smelifaro * XXX: Do we need to restrict swap between locked tables? 1369272840Smelifaro * XXX: Do we need to exchange ftype? 1370272840Smelifaro * 1371272840Smelifaro * Returns 0 on success. 1372272840Smelifaro */ 1373272840Smelifarostatic int 1374272840Smelifaroswap_tables(struct ip_fw_chain *ch, struct tid_info *a, 1375272840Smelifaro struct tid_info *b) 1376232865Smelifaro{ 1377272840Smelifaro struct namedobj_instance *ni; 1378272840Smelifaro struct table_config *tc_a, *tc_b; 1379272840Smelifaro struct table_algo *ta; 1380272840Smelifaro struct table_info ti, *tablestate; 1381272840Smelifaro void *astate; 1382272840Smelifaro uint32_t count; 1383272840Smelifaro 1384272840Smelifaro /* 1385272840Smelifaro * Stage 1: find both tables and ensure they are of 1386272840Smelifaro * the same type. 1387272840Smelifaro */ 1388272840Smelifaro IPFW_UH_WLOCK(ch); 1389272840Smelifaro ni = CHAIN_TO_NI(ch); 1390272840Smelifaro if ((tc_a = find_table(ni, a)) == NULL) { 1391272840Smelifaro IPFW_UH_WUNLOCK(ch); 1392272840Smelifaro return (ESRCH); 1393272840Smelifaro } 1394272840Smelifaro if ((tc_b = find_table(ni, b)) == NULL) { 1395272840Smelifaro IPFW_UH_WUNLOCK(ch); 1396272840Smelifaro return (ESRCH); 1397272840Smelifaro } 1398272840Smelifaro 1399272840Smelifaro /* It is very easy to swap between the same table */ 1400272840Smelifaro if (tc_a == tc_b) { 1401272840Smelifaro IPFW_UH_WUNLOCK(ch); 1402272840Smelifaro return (0); 1403272840Smelifaro } 1404272840Smelifaro 1405272840Smelifaro /* Check type and value are the same */ 1406282070Smelifaro if (tc_a->no.subtype!=tc_b->no.subtype || tc_a->tflags!=tc_b->tflags) { 1407272840Smelifaro IPFW_UH_WUNLOCK(ch); 1408272840Smelifaro return (EINVAL); 1409272840Smelifaro } 1410272840Smelifaro 1411272840Smelifaro /* Check limits before swap */ 1412272840Smelifaro if ((tc_a->limit != 0 && tc_b->count > tc_a->limit) || 1413272840Smelifaro (tc_b->limit != 0 && tc_a->count > tc_b->limit)) { 1414272840Smelifaro IPFW_UH_WUNLOCK(ch); 1415272840Smelifaro return (EFBIG); 1416272840Smelifaro } 1417272840Smelifaro 1418272840Smelifaro /* Check if one of the tables is readonly */ 1419272840Smelifaro if (((tc_a->ta->flags | tc_b->ta->flags) & TA_FLAG_READONLY) != 0) { 1420272840Smelifaro IPFW_UH_WUNLOCK(ch); 1421272840Smelifaro return (EACCES); 1422272840Smelifaro } 1423272840Smelifaro 1424272840Smelifaro /* Notify we're going to swap */ 1425272840Smelifaro rollback_toperation_state(ch, tc_a); 1426272840Smelifaro rollback_toperation_state(ch, tc_b); 1427272840Smelifaro 1428272840Smelifaro /* Everything is fine, prepare to swap */ 1429272840Smelifaro tablestate = (struct table_info *)ch->tablestate; 1430272840Smelifaro ti = tablestate[tc_a->no.kidx]; 1431272840Smelifaro ta = tc_a->ta; 1432272840Smelifaro astate = tc_a->astate; 1433272840Smelifaro count = tc_a->count; 1434272840Smelifaro 1435272840Smelifaro IPFW_WLOCK(ch); 1436272840Smelifaro /* a <- b */ 1437272840Smelifaro tablestate[tc_a->no.kidx] = tablestate[tc_b->no.kidx]; 1438272840Smelifaro tc_a->ta = tc_b->ta; 1439272840Smelifaro tc_a->astate = tc_b->astate; 1440272840Smelifaro tc_a->count = tc_b->count; 1441272840Smelifaro /* b <- a */ 1442272840Smelifaro tablestate[tc_b->no.kidx] = ti; 1443272840Smelifaro tc_b->ta = ta; 1444272840Smelifaro tc_b->astate = astate; 1445272840Smelifaro tc_b->count = count; 1446272840Smelifaro IPFW_WUNLOCK(ch); 1447272840Smelifaro 1448272840Smelifaro /* Ensure tc.ti copies are in sync */ 1449272840Smelifaro tc_a->ti_copy = tablestate[tc_a->no.kidx]; 1450272840Smelifaro tc_b->ti_copy = tablestate[tc_b->no.kidx]; 1451272840Smelifaro 1452272840Smelifaro /* Notify both tables on @ti change */ 1453272840Smelifaro if (tc_a->ta->change_ti != NULL) 1454272840Smelifaro tc_a->ta->change_ti(tc_a->astate, &tablestate[tc_a->no.kidx]); 1455272840Smelifaro if (tc_b->ta->change_ti != NULL) 1456272840Smelifaro tc_b->ta->change_ti(tc_b->astate, &tablestate[tc_b->no.kidx]); 1457272840Smelifaro 1458272840Smelifaro IPFW_UH_WUNLOCK(ch); 1459272840Smelifaro 1460200590Sluigi return (0); 1461200590Sluigi} 1462200590Sluigi 1463272840Smelifaro/* 1464272840Smelifaro * Destroys table specified by @ti. 1465272840Smelifaro * Data layout (v0)(current): 1466272840Smelifaro * Request: [ ip_fw3_opheader ] 1467272840Smelifaro * 1468272840Smelifaro * Returns 0 on success 1469272840Smelifaro */ 1470272840Smelifarostatic int 1471272840Smelifarodestroy_table(struct ip_fw_chain *ch, struct tid_info *ti) 1472272840Smelifaro{ 1473272840Smelifaro struct namedobj_instance *ni; 1474272840Smelifaro struct table_config *tc; 1475272840Smelifaro 1476272840Smelifaro IPFW_UH_WLOCK(ch); 1477272840Smelifaro 1478272840Smelifaro ni = CHAIN_TO_NI(ch); 1479272840Smelifaro if ((tc = find_table(ni, ti)) == NULL) { 1480272840Smelifaro IPFW_UH_WUNLOCK(ch); 1481272840Smelifaro return (ESRCH); 1482272840Smelifaro } 1483272840Smelifaro 1484272840Smelifaro /* Do not permit destroying referenced tables */ 1485272840Smelifaro if (tc->no.refcnt > 0) { 1486272840Smelifaro IPFW_UH_WUNLOCK(ch); 1487272840Smelifaro return (EBUSY); 1488272840Smelifaro } 1489272840Smelifaro 1490272840Smelifaro IPFW_WLOCK(ch); 1491272840Smelifaro unlink_table(ch, tc); 1492272840Smelifaro IPFW_WUNLOCK(ch); 1493272840Smelifaro 1494272840Smelifaro /* Free obj index */ 1495272840Smelifaro if (ipfw_objhash_free_idx(ni, tc->no.kidx) != 0) 1496272840Smelifaro printf("Error unlinking kidx %d from table %s\n", 1497272840Smelifaro tc->no.kidx, tc->tablename); 1498272840Smelifaro 1499272840Smelifaro /* Unref values used in tables while holding UH lock */ 1500272840Smelifaro ipfw_unref_table_values(ch, tc, tc->ta, tc->astate, &tc->ti_copy); 1501272840Smelifaro IPFW_UH_WUNLOCK(ch); 1502272840Smelifaro 1503272840Smelifaro free_table_config(ni, tc); 1504272840Smelifaro 1505272840Smelifaro return (0); 1506272840Smelifaro} 1507272840Smelifaro 1508273274Smelifarostatic uint32_t 1509273274Smelifaroroundup2p(uint32_t v) 1510273274Smelifaro{ 1511273274Smelifaro 1512273274Smelifaro v--; 1513273274Smelifaro v |= v >> 1; 1514273274Smelifaro v |= v >> 2; 1515273274Smelifaro v |= v >> 4; 1516273274Smelifaro v |= v >> 8; 1517273274Smelifaro v |= v >> 16; 1518273274Smelifaro v++; 1519273274Smelifaro 1520273274Smelifaro return (v); 1521273274Smelifaro} 1522273274Smelifaro 1523272840Smelifaro/* 1524272840Smelifaro * Grow tables index. 1525272840Smelifaro * 1526272840Smelifaro * Returns 0 on success. 1527272840Smelifaro */ 1528200590Sluigiint 1529233478Smelifaroipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables) 1530233478Smelifaro{ 1531233478Smelifaro unsigned int ntables_old, tbl; 1532272840Smelifaro struct namedobj_instance *ni; 1533272840Smelifaro void *new_idx, *old_tablestate, *tablestate; 1534272840Smelifaro struct table_info *ti; 1535272840Smelifaro struct table_config *tc; 1536272840Smelifaro int i, new_blocks; 1537233478Smelifaro 1538233478Smelifaro /* Check new value for validity */ 1539273274Smelifaro if (ntables == 0) 1540273274Smelifaro return (EINVAL); 1541233478Smelifaro if (ntables > IPFW_TABLES_MAX) 1542233478Smelifaro ntables = IPFW_TABLES_MAX; 1543273274Smelifaro /* Alight to nearest power of 2 */ 1544273274Smelifaro ntables = (unsigned int)roundup2p(ntables); 1545233478Smelifaro 1546233478Smelifaro /* Allocate new pointers */ 1547272840Smelifaro tablestate = malloc(ntables * sizeof(struct table_info), 1548272840Smelifaro M_IPFW, M_WAITOK | M_ZERO); 1549233478Smelifaro 1550272840Smelifaro ipfw_objhash_bitmap_alloc(ntables, (void *)&new_idx, &new_blocks); 1551233478Smelifaro 1552272840Smelifaro IPFW_UH_WLOCK(ch); 1553272840Smelifaro 1554233478Smelifaro tbl = (ntables >= V_fw_tables_max) ? V_fw_tables_max : ntables; 1555272840Smelifaro ni = CHAIN_TO_NI(ch); 1556233478Smelifaro 1557272840Smelifaro /* Temporary restrict decreasing max_tables */ 1558272840Smelifaro if (ntables < V_fw_tables_max) { 1559233478Smelifaro 1560272840Smelifaro /* 1561272840Smelifaro * FIXME: Check if we really can shrink 1562272840Smelifaro */ 1563272840Smelifaro IPFW_UH_WUNLOCK(ch); 1564272840Smelifaro return (EINVAL); 1565272840Smelifaro } 1566233478Smelifaro 1567272840Smelifaro /* Copy table info/indices */ 1568272840Smelifaro memcpy(tablestate, ch->tablestate, sizeof(struct table_info) * tbl); 1569272840Smelifaro ipfw_objhash_bitmap_merge(ni, &new_idx, &new_blocks); 1570272840Smelifaro 1571272840Smelifaro IPFW_WLOCK(ch); 1572272840Smelifaro 1573272840Smelifaro /* Change pointers */ 1574272840Smelifaro old_tablestate = ch->tablestate; 1575272840Smelifaro ch->tablestate = tablestate; 1576272840Smelifaro ipfw_objhash_bitmap_swap(ni, &new_idx, &new_blocks); 1577272840Smelifaro 1578233478Smelifaro ntables_old = V_fw_tables_max; 1579233478Smelifaro V_fw_tables_max = ntables; 1580233478Smelifaro 1581233478Smelifaro IPFW_WUNLOCK(ch); 1582233478Smelifaro 1583272840Smelifaro /* Notify all consumers that their @ti pointer has changed */ 1584272840Smelifaro ti = (struct table_info *)ch->tablestate; 1585272840Smelifaro for (i = 0; i < tbl; i++, ti++) { 1586272840Smelifaro if (ti->lookup == NULL) 1587272840Smelifaro continue; 1588272840Smelifaro tc = (struct table_config *)ipfw_objhash_lookup_kidx(ni, i); 1589272840Smelifaro if (tc == NULL || tc->ta->change_ti == NULL) 1590272840Smelifaro continue; 1591272840Smelifaro 1592272840Smelifaro tc->ta->change_ti(tc->astate, ti); 1593272840Smelifaro } 1594272840Smelifaro 1595272840Smelifaro IPFW_UH_WUNLOCK(ch); 1596272840Smelifaro 1597272840Smelifaro /* Free old pointers */ 1598272840Smelifaro free(old_tablestate, M_IPFW); 1599272840Smelifaro ipfw_objhash_bitmap_free(new_idx, new_blocks); 1600272840Smelifaro 1601272840Smelifaro return (0); 1602272840Smelifaro} 1603272840Smelifaro 1604272840Smelifaro/* 1605272840Smelifaro * Switch between "set 0" and "rule's set" table binding, 1606272840Smelifaro * Check all ruleset bindings and permits changing 1607272840Smelifaro * IFF each binding has both rule AND table in default set (set 0). 1608272840Smelifaro * 1609272840Smelifaro * Returns 0 on success. 1610272840Smelifaro */ 1611272840Smelifaroint 1612272840Smelifaroipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int sets) 1613272840Smelifaro{ 1614272840Smelifaro struct namedobj_instance *ni; 1615272840Smelifaro struct named_object *no; 1616272840Smelifaro struct ip_fw *rule; 1617272840Smelifaro ipfw_insn *cmd; 1618272840Smelifaro int cmdlen, i, l; 1619272840Smelifaro uint16_t kidx; 1620272840Smelifaro 1621272840Smelifaro IPFW_UH_WLOCK(ch); 1622272840Smelifaro 1623272840Smelifaro if (V_fw_tables_sets == sets) { 1624272840Smelifaro IPFW_UH_WUNLOCK(ch); 1625272840Smelifaro return (0); 1626272840Smelifaro } 1627272840Smelifaro 1628272840Smelifaro ni = CHAIN_TO_NI(ch); 1629272840Smelifaro 1630272840Smelifaro /* 1631272840Smelifaro * Scan all rules and examine tables opcodes. 1632272840Smelifaro */ 1633272840Smelifaro for (i = 0; i < ch->n_rules; i++) { 1634272840Smelifaro rule = ch->map[i]; 1635272840Smelifaro 1636272840Smelifaro l = rule->cmd_len; 1637272840Smelifaro cmd = rule->cmd; 1638272840Smelifaro cmdlen = 0; 1639272840Smelifaro for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 1640272840Smelifaro cmdlen = F_LEN(cmd); 1641272840Smelifaro 1642282070Smelifaro if (classify_opcode_kidx(cmd, &kidx) != 0) 1643272840Smelifaro continue; 1644272840Smelifaro 1645272840Smelifaro no = ipfw_objhash_lookup_kidx(ni, kidx); 1646272840Smelifaro 1647272840Smelifaro /* Check if both table object and rule has the set 0 */ 1648272840Smelifaro if (no->set != 0 || rule->set != 0) { 1649272840Smelifaro IPFW_UH_WUNLOCK(ch); 1650272840Smelifaro return (EBUSY); 1651233478Smelifaro } 1652233478Smelifaro 1653233478Smelifaro } 1654233478Smelifaro } 1655272840Smelifaro V_fw_tables_sets = sets; 1656233478Smelifaro 1657272840Smelifaro IPFW_UH_WUNLOCK(ch); 1658233478Smelifaro 1659233478Smelifaro return (0); 1660233478Smelifaro} 1661233478Smelifaro 1662272840Smelifaro/* 1663272840Smelifaro * Lookup an IP @addr in table @tbl. 1664272840Smelifaro * Stores found value in @val. 1665272840Smelifaro * 1666272840Smelifaro * Returns 1 if @addr was found. 1667272840Smelifaro */ 1668233478Smelifaroint 1669200590Sluigiipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr, 1670200590Sluigi uint32_t *val) 1671200590Sluigi{ 1672272840Smelifaro struct table_info *ti; 1673200590Sluigi 1674272840Smelifaro ti = KIDX_TO_TI(ch, tbl); 1675272840Smelifaro 1676272840Smelifaro return (ti->lookup(ti, &addr, sizeof(in_addr_t), val)); 1677272840Smelifaro} 1678272840Smelifaro 1679272840Smelifaro/* 1680272840Smelifaro * Lookup an arbtrary key @paddr of legth @plen in table @tbl. 1681272840Smelifaro * Stores found value in @val. 1682272840Smelifaro * 1683272840Smelifaro * Returns 1 if key was found. 1684272840Smelifaro */ 1685272840Smelifaroint 1686272840Smelifaroipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl, uint16_t plen, 1687272840Smelifaro void *paddr, uint32_t *val) 1688272840Smelifaro{ 1689272840Smelifaro struct table_info *ti; 1690272840Smelifaro 1691272840Smelifaro ti = KIDX_TO_TI(ch, tbl); 1692272840Smelifaro 1693272840Smelifaro return (ti->lookup(ti, paddr, plen, val)); 1694272840Smelifaro} 1695272840Smelifaro 1696272840Smelifaro/* 1697272840Smelifaro * Info/List/dump support for tables. 1698272840Smelifaro * 1699272840Smelifaro */ 1700272840Smelifaro 1701272840Smelifaro/* 1702272840Smelifaro * High-level 'get' cmds sysctl handlers 1703272840Smelifaro */ 1704272840Smelifaro 1705272840Smelifaro/* 1706272840Smelifaro * Lists all tables currently available in kernel. 1707272840Smelifaro * Data layout (v0)(current): 1708272840Smelifaro * Request: [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size 1709272840Smelifaro * Reply: [ ipfw_obj_lheader ipfw_xtable_info x N ] 1710272840Smelifaro * 1711272840Smelifaro * Returns 0 on success 1712272840Smelifaro */ 1713272840Smelifarostatic int 1714272840Smelifarolist_tables(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1715272840Smelifaro struct sockopt_data *sd) 1716272840Smelifaro{ 1717272840Smelifaro struct _ipfw_obj_lheader *olh; 1718272840Smelifaro int error; 1719272840Smelifaro 1720272840Smelifaro olh = (struct _ipfw_obj_lheader *)ipfw_get_sopt_header(sd,sizeof(*olh)); 1721272840Smelifaro if (olh == NULL) 1722272840Smelifaro return (EINVAL); 1723272840Smelifaro if (sd->valsize < olh->size) 1724272840Smelifaro return (EINVAL); 1725272840Smelifaro 1726272840Smelifaro IPFW_UH_RLOCK(ch); 1727272840Smelifaro error = export_tables(ch, olh, sd); 1728272840Smelifaro IPFW_UH_RUNLOCK(ch); 1729272840Smelifaro 1730272840Smelifaro return (error); 1731272840Smelifaro} 1732272840Smelifaro 1733272840Smelifaro/* 1734272840Smelifaro * Store table info to buffer provided by @sd. 1735272840Smelifaro * Data layout (v0)(current): 1736272840Smelifaro * Request: [ ipfw_obj_header ipfw_xtable_info(empty)] 1737272840Smelifaro * Reply: [ ipfw_obj_header ipfw_xtable_info ] 1738272840Smelifaro * 1739272840Smelifaro * Returns 0 on success. 1740272840Smelifaro */ 1741272840Smelifarostatic int 1742272840Smelifarodescribe_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1743272840Smelifaro struct sockopt_data *sd) 1744272840Smelifaro{ 1745272840Smelifaro struct _ipfw_obj_header *oh; 1746272840Smelifaro struct table_config *tc; 1747272840Smelifaro struct tid_info ti; 1748272840Smelifaro size_t sz; 1749272840Smelifaro 1750272840Smelifaro sz = sizeof(*oh) + sizeof(ipfw_xtable_info); 1751272840Smelifaro oh = (struct _ipfw_obj_header *)ipfw_get_sopt_header(sd, sz); 1752272840Smelifaro if (oh == NULL) 1753272840Smelifaro return (EINVAL); 1754272840Smelifaro 1755272840Smelifaro objheader_to_ti(oh, &ti); 1756272840Smelifaro 1757272840Smelifaro IPFW_UH_RLOCK(ch); 1758272840Smelifaro if ((tc = find_table(CHAIN_TO_NI(ch), &ti)) == NULL) { 1759272840Smelifaro IPFW_UH_RUNLOCK(ch); 1760272840Smelifaro return (ESRCH); 1761200590Sluigi } 1762272840Smelifaro 1763272840Smelifaro export_table_info(ch, tc, (ipfw_xtable_info *)(oh + 1)); 1764272840Smelifaro IPFW_UH_RUNLOCK(ch); 1765272840Smelifaro 1766200590Sluigi return (0); 1767200590Sluigi} 1768200590Sluigi 1769272840Smelifaro/* 1770272840Smelifaro * Modifies existing table. 1771272840Smelifaro * Data layout (v0)(current): 1772272840Smelifaro * Request: [ ipfw_obj_header ipfw_xtable_info ] 1773272840Smelifaro * 1774272840Smelifaro * Returns 0 on success 1775272840Smelifaro */ 1776272840Smelifarostatic int 1777272840Smelifaromodify_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1778272840Smelifaro struct sockopt_data *sd) 1779232865Smelifaro{ 1780272840Smelifaro struct _ipfw_obj_header *oh; 1781272840Smelifaro ipfw_xtable_info *i; 1782272840Smelifaro char *tname; 1783272840Smelifaro struct tid_info ti; 1784272840Smelifaro struct namedobj_instance *ni; 1785272840Smelifaro struct table_config *tc; 1786232865Smelifaro 1787272840Smelifaro if (sd->valsize != sizeof(*oh) + sizeof(ipfw_xtable_info)) 1788272840Smelifaro return (EINVAL); 1789232865Smelifaro 1790272840Smelifaro oh = (struct _ipfw_obj_header *)sd->kbuf; 1791272840Smelifaro i = (ipfw_xtable_info *)(oh + 1); 1792232865Smelifaro 1793272840Smelifaro /* 1794272840Smelifaro * Verify user-supplied strings. 1795272840Smelifaro * Check for null-terminated/zero-length strings/ 1796272840Smelifaro */ 1797272840Smelifaro tname = oh->ntlv.name; 1798290332Sae if (check_table_name(tname) != 0) 1799272840Smelifaro return (EINVAL); 1800232865Smelifaro 1801272840Smelifaro objheader_to_ti(oh, &ti); 1802272840Smelifaro ti.type = i->type; 1803272840Smelifaro 1804272840Smelifaro IPFW_UH_WLOCK(ch); 1805272840Smelifaro ni = CHAIN_TO_NI(ch); 1806272840Smelifaro if ((tc = find_table(ni, &ti)) == NULL) { 1807272840Smelifaro IPFW_UH_WUNLOCK(ch); 1808272840Smelifaro return (ESRCH); 1809232865Smelifaro } 1810232865Smelifaro 1811272840Smelifaro /* Do not support any modifications for readonly tables */ 1812272840Smelifaro if ((tc->ta->flags & TA_FLAG_READONLY) != 0) { 1813272840Smelifaro IPFW_UH_WUNLOCK(ch); 1814272840Smelifaro return (EACCES); 1815232865Smelifaro } 1816272840Smelifaro 1817272840Smelifaro if ((i->mflags & IPFW_TMFLAGS_LIMIT) != 0) 1818272840Smelifaro tc->limit = i->limit; 1819272840Smelifaro if ((i->mflags & IPFW_TMFLAGS_LOCK) != 0) 1820272840Smelifaro tc->locked = ((i->flags & IPFW_TGFLAGS_LOCKED) != 0); 1821272840Smelifaro IPFW_UH_WUNLOCK(ch); 1822272840Smelifaro 1823232865Smelifaro return (0); 1824232865Smelifaro} 1825232865Smelifaro 1826272840Smelifaro/* 1827272840Smelifaro * Creates new table. 1828272840Smelifaro * Data layout (v0)(current): 1829272840Smelifaro * Request: [ ipfw_obj_header ipfw_xtable_info ] 1830272840Smelifaro * 1831272840Smelifaro * Returns 0 on success 1832272840Smelifaro */ 1833200590Sluigistatic int 1834272840Smelifarocreate_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 1835272840Smelifaro struct sockopt_data *sd) 1836200590Sluigi{ 1837272840Smelifaro struct _ipfw_obj_header *oh; 1838272840Smelifaro ipfw_xtable_info *i; 1839272840Smelifaro char *tname, *aname; 1840272840Smelifaro struct tid_info ti; 1841272840Smelifaro struct namedobj_instance *ni; 1842200590Sluigi 1843272840Smelifaro if (sd->valsize != sizeof(*oh) + sizeof(ipfw_xtable_info)) 1844272840Smelifaro return (EINVAL); 1845272840Smelifaro 1846272840Smelifaro oh = (struct _ipfw_obj_header *)sd->kbuf; 1847272840Smelifaro i = (ipfw_xtable_info *)(oh + 1); 1848272840Smelifaro 1849272840Smelifaro /* 1850272840Smelifaro * Verify user-supplied strings. 1851272840Smelifaro * Check for null-terminated/zero-length strings/ 1852272840Smelifaro */ 1853272840Smelifaro tname = oh->ntlv.name; 1854272840Smelifaro aname = i->algoname; 1855290332Sae if (check_table_name(tname) != 0 || 1856272840Smelifaro strnlen(aname, sizeof(i->algoname)) == sizeof(i->algoname)) 1857272840Smelifaro return (EINVAL); 1858272840Smelifaro 1859272840Smelifaro if (aname[0] == '\0') { 1860272840Smelifaro /* Use default algorithm */ 1861272840Smelifaro aname = NULL; 1862272840Smelifaro } 1863272840Smelifaro 1864272840Smelifaro objheader_to_ti(oh, &ti); 1865272840Smelifaro ti.type = i->type; 1866272840Smelifaro 1867272840Smelifaro ni = CHAIN_TO_NI(ch); 1868272840Smelifaro 1869272840Smelifaro IPFW_UH_RLOCK(ch); 1870274087Smelifaro if (find_table(ni, &ti) != NULL) { 1871272840Smelifaro IPFW_UH_RUNLOCK(ch); 1872272840Smelifaro return (EEXIST); 1873272840Smelifaro } 1874272840Smelifaro IPFW_UH_RUNLOCK(ch); 1875272840Smelifaro 1876272840Smelifaro return (create_table_internal(ch, &ti, aname, i, NULL, 0)); 1877272840Smelifaro} 1878272840Smelifaro 1879272840Smelifaro/* 1880272840Smelifaro * Creates new table based on @ti and @aname. 1881272840Smelifaro * 1882272840Smelifaro * Relies on table name checking inside find_name_tlv() 1883272840Smelifaro * Assume @aname to be checked and valid. 1884272840Smelifaro * Stores allocated table kidx inside @pkidx (if non-NULL). 1885272840Smelifaro * Reference created table if @compat is non-zero. 1886272840Smelifaro * 1887272840Smelifaro * Returns 0 on success. 1888272840Smelifaro */ 1889272840Smelifarostatic int 1890272840Smelifarocreate_table_internal(struct ip_fw_chain *ch, struct tid_info *ti, 1891272840Smelifaro char *aname, ipfw_xtable_info *i, uint16_t *pkidx, int compat) 1892272840Smelifaro{ 1893272840Smelifaro struct namedobj_instance *ni; 1894272840Smelifaro struct table_config *tc, *tc_new, *tmp; 1895272840Smelifaro struct table_algo *ta; 1896272840Smelifaro uint16_t kidx; 1897272840Smelifaro 1898272840Smelifaro ni = CHAIN_TO_NI(ch); 1899272840Smelifaro 1900272840Smelifaro ta = find_table_algo(CHAIN_TO_TCFG(ch), ti, aname); 1901272840Smelifaro if (ta == NULL) 1902272840Smelifaro return (ENOTSUP); 1903272840Smelifaro 1904272840Smelifaro tc = alloc_table_config(ch, ti, ta, aname, i->tflags); 1905272840Smelifaro if (tc == NULL) 1906272840Smelifaro return (ENOMEM); 1907272840Smelifaro 1908272840Smelifaro tc->vmask = i->vmask; 1909272840Smelifaro tc->limit = i->limit; 1910272840Smelifaro if (ta->flags & TA_FLAG_READONLY) 1911272840Smelifaro tc->locked = 1; 1912272840Smelifaro else 1913272840Smelifaro tc->locked = (i->flags & IPFW_TGFLAGS_LOCKED) != 0; 1914272840Smelifaro 1915272840Smelifaro IPFW_UH_WLOCK(ch); 1916272840Smelifaro 1917272840Smelifaro /* Check if table has been already created */ 1918272840Smelifaro tc_new = find_table(ni, ti); 1919272840Smelifaro if (tc_new != NULL) { 1920272840Smelifaro 1921272840Smelifaro /* 1922272840Smelifaro * Compat: do not fail if we're 1923272840Smelifaro * requesting to create existing table 1924272840Smelifaro * which has the same type 1925272840Smelifaro */ 1926282070Smelifaro if (compat == 0 || tc_new->no.subtype != tc->no.subtype) { 1927272840Smelifaro IPFW_UH_WUNLOCK(ch); 1928272840Smelifaro free_table_config(ni, tc); 1929272840Smelifaro return (EEXIST); 1930272840Smelifaro } 1931272840Smelifaro 1932272840Smelifaro /* Exchange tc and tc_new for proper refcounting & freeing */ 1933272840Smelifaro tmp = tc; 1934272840Smelifaro tc = tc_new; 1935272840Smelifaro tc_new = tmp; 1936272840Smelifaro } else { 1937272840Smelifaro /* New table */ 1938272840Smelifaro if (ipfw_objhash_alloc_idx(ni, &kidx) != 0) { 1939272840Smelifaro IPFW_UH_WUNLOCK(ch); 1940272840Smelifaro printf("Unable to allocate table index." 1941272840Smelifaro " Consider increasing net.inet.ip.fw.tables_max"); 1942272840Smelifaro free_table_config(ni, tc); 1943272840Smelifaro return (EBUSY); 1944272840Smelifaro } 1945272840Smelifaro tc->no.kidx = kidx; 1946282070Smelifaro tc->no.etlv = IPFW_TLV_TBL_NAME; 1947272840Smelifaro 1948272840Smelifaro IPFW_WLOCK(ch); 1949272840Smelifaro link_table(ch, tc); 1950272840Smelifaro IPFW_WUNLOCK(ch); 1951272840Smelifaro } 1952272840Smelifaro 1953272840Smelifaro if (compat != 0) 1954272840Smelifaro tc->no.refcnt++; 1955272840Smelifaro if (pkidx != NULL) 1956272840Smelifaro *pkidx = tc->no.kidx; 1957272840Smelifaro 1958272840Smelifaro IPFW_UH_WUNLOCK(ch); 1959272840Smelifaro 1960272840Smelifaro if (tc_new != NULL) 1961272840Smelifaro free_table_config(ni, tc_new); 1962272840Smelifaro 1963200590Sluigi return (0); 1964200590Sluigi} 1965200590Sluigi 1966272840Smelifarostatic void 1967272840Smelifarontlv_to_ti(ipfw_obj_ntlv *ntlv, struct tid_info *ti) 1968272840Smelifaro{ 1969272840Smelifaro 1970272840Smelifaro memset(ti, 0, sizeof(struct tid_info)); 1971272840Smelifaro ti->set = ntlv->set; 1972272840Smelifaro ti->uidx = ntlv->idx; 1973272840Smelifaro ti->tlvs = ntlv; 1974272840Smelifaro ti->tlen = ntlv->head.length; 1975272840Smelifaro} 1976272840Smelifaro 1977272840Smelifarostatic void 1978272840Smelifaroobjheader_to_ti(struct _ipfw_obj_header *oh, struct tid_info *ti) 1979272840Smelifaro{ 1980272840Smelifaro 1981272840Smelifaro ntlv_to_ti(&oh->ntlv, ti); 1982272840Smelifaro} 1983272840Smelifaro 1984282070Smelifarostruct namedobj_instance * 1985282070Smelifaroipfw_get_table_objhash(struct ip_fw_chain *ch) 1986282070Smelifaro{ 1987282070Smelifaro 1988282070Smelifaro return (CHAIN_TO_NI(ch)); 1989282070Smelifaro} 1990282070Smelifaro 1991272840Smelifaro/* 1992272840Smelifaro * Exports basic table info as name TLV. 1993272840Smelifaro * Used inside dump_static_rules() to provide info 1994272840Smelifaro * about all tables referenced by current ruleset. 1995272840Smelifaro * 1996272840Smelifaro * Returns 0 on success. 1997272840Smelifaro */ 1998200590Sluigiint 1999272840Smelifaroipfw_export_table_ntlv(struct ip_fw_chain *ch, uint16_t kidx, 2000272840Smelifaro struct sockopt_data *sd) 2001200590Sluigi{ 2002272840Smelifaro struct namedobj_instance *ni; 2003272840Smelifaro struct named_object *no; 2004272840Smelifaro ipfw_obj_ntlv *ntlv; 2005200590Sluigi 2006272840Smelifaro ni = CHAIN_TO_NI(ch); 2007272840Smelifaro 2008272840Smelifaro no = ipfw_objhash_lookup_kidx(ni, kidx); 2009272840Smelifaro KASSERT(no != NULL, ("invalid table kidx passed")); 2010272840Smelifaro 2011272840Smelifaro ntlv = (ipfw_obj_ntlv *)ipfw_get_sopt_space(sd, sizeof(*ntlv)); 2012272840Smelifaro if (ntlv == NULL) 2013272840Smelifaro return (ENOMEM); 2014272840Smelifaro 2015272840Smelifaro ntlv->head.type = IPFW_TLV_TBL_NAME; 2016272840Smelifaro ntlv->head.length = sizeof(*ntlv); 2017272840Smelifaro ntlv->idx = no->kidx; 2018272840Smelifaro strlcpy(ntlv->name, no->name, sizeof(ntlv->name)); 2019272840Smelifaro 2020272840Smelifaro return (0); 2021272840Smelifaro} 2022272840Smelifaro 2023272840Smelifarostruct dump_args { 2024272840Smelifaro struct ip_fw_chain *ch; 2025272840Smelifaro struct table_info *ti; 2026272840Smelifaro struct table_config *tc; 2027272840Smelifaro struct sockopt_data *sd; 2028272840Smelifaro uint32_t cnt; 2029272840Smelifaro uint16_t uidx; 2030272840Smelifaro int error; 2031272840Smelifaro uint32_t size; 2032272840Smelifaro ipfw_table_entry *ent; 2033272840Smelifaro ta_foreach_f *f; 2034272840Smelifaro void *farg; 2035272840Smelifaro ipfw_obj_tentry tent; 2036272840Smelifaro}; 2037272840Smelifaro 2038272840Smelifarostatic int 2039272840Smelifarocount_ext_entries(void *e, void *arg) 2040272840Smelifaro{ 2041272840Smelifaro struct dump_args *da; 2042272840Smelifaro 2043272840Smelifaro da = (struct dump_args *)arg; 2044272840Smelifaro da->cnt++; 2045272840Smelifaro 2046272840Smelifaro return (0); 2047272840Smelifaro} 2048272840Smelifaro 2049272840Smelifaro/* 2050272840Smelifaro * Gets number of items from table either using 2051272840Smelifaro * internal counter or calling algo callback for 2052272840Smelifaro * externally-managed tables. 2053272840Smelifaro * 2054272840Smelifaro * Returns number of records. 2055272840Smelifaro */ 2056272840Smelifarostatic uint32_t 2057272840Smelifarotable_get_count(struct ip_fw_chain *ch, struct table_config *tc) 2058272840Smelifaro{ 2059272840Smelifaro struct table_info *ti; 2060272840Smelifaro struct table_algo *ta; 2061272840Smelifaro struct dump_args da; 2062272840Smelifaro 2063272840Smelifaro ti = KIDX_TO_TI(ch, tc->no.kidx); 2064272840Smelifaro ta = tc->ta; 2065272840Smelifaro 2066272840Smelifaro /* Use internal counter for self-managed tables */ 2067272840Smelifaro if ((ta->flags & TA_FLAG_READONLY) == 0) 2068272840Smelifaro return (tc->count); 2069272840Smelifaro 2070272840Smelifaro /* Use callback to quickly get number of items */ 2071272840Smelifaro if ((ta->flags & TA_FLAG_EXTCOUNTER) != 0) 2072272840Smelifaro return (ta->get_count(tc->astate, ti)); 2073272840Smelifaro 2074272840Smelifaro /* Count number of iterms ourselves */ 2075272840Smelifaro memset(&da, 0, sizeof(da)); 2076272840Smelifaro ta->foreach(tc->astate, ti, count_ext_entries, &da); 2077272840Smelifaro 2078272840Smelifaro return (da.cnt); 2079272840Smelifaro} 2080272840Smelifaro 2081272840Smelifaro/* 2082272840Smelifaro * Exports table @tc info into standard ipfw_xtable_info format. 2083272840Smelifaro */ 2084272840Smelifarostatic void 2085272840Smelifaroexport_table_info(struct ip_fw_chain *ch, struct table_config *tc, 2086272840Smelifaro ipfw_xtable_info *i) 2087272840Smelifaro{ 2088272840Smelifaro struct table_info *ti; 2089272840Smelifaro struct table_algo *ta; 2090272840Smelifaro 2091282070Smelifaro i->type = tc->no.subtype; 2092272840Smelifaro i->tflags = tc->tflags; 2093272840Smelifaro i->vmask = tc->vmask; 2094272840Smelifaro i->set = tc->no.set; 2095272840Smelifaro i->kidx = tc->no.kidx; 2096272840Smelifaro i->refcnt = tc->no.refcnt; 2097272840Smelifaro i->count = table_get_count(ch, tc); 2098272840Smelifaro i->limit = tc->limit; 2099272840Smelifaro i->flags |= (tc->locked != 0) ? IPFW_TGFLAGS_LOCKED : 0; 2100293625Smelifaro i->size = i->count * sizeof(ipfw_obj_tentry); 2101272840Smelifaro i->size += sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info); 2102272840Smelifaro strlcpy(i->tablename, tc->tablename, sizeof(i->tablename)); 2103272840Smelifaro ti = KIDX_TO_TI(ch, tc->no.kidx); 2104272840Smelifaro ta = tc->ta; 2105272840Smelifaro if (ta->print_config != NULL) { 2106272840Smelifaro /* Use algo function to print table config to string */ 2107272840Smelifaro ta->print_config(tc->astate, ti, i->algoname, 2108272840Smelifaro sizeof(i->algoname)); 2109272840Smelifaro } else 2110272840Smelifaro strlcpy(i->algoname, ta->name, sizeof(i->algoname)); 2111272840Smelifaro /* Dump algo-specific data, if possible */ 2112272840Smelifaro if (ta->dump_tinfo != NULL) { 2113272840Smelifaro ta->dump_tinfo(tc->astate, ti, &i->ta_info); 2114272840Smelifaro i->ta_info.flags |= IPFW_TATFLAGS_DATA; 2115272840Smelifaro } 2116272840Smelifaro} 2117272840Smelifaro 2118272840Smelifarostruct dump_table_args { 2119272840Smelifaro struct ip_fw_chain *ch; 2120272840Smelifaro struct sockopt_data *sd; 2121272840Smelifaro}; 2122272840Smelifaro 2123272840Smelifarostatic void 2124272840Smelifaroexport_table_internal(struct namedobj_instance *ni, struct named_object *no, 2125272840Smelifaro void *arg) 2126272840Smelifaro{ 2127272840Smelifaro ipfw_xtable_info *i; 2128272840Smelifaro struct dump_table_args *dta; 2129272840Smelifaro 2130272840Smelifaro dta = (struct dump_table_args *)arg; 2131272840Smelifaro 2132272840Smelifaro i = (ipfw_xtable_info *)ipfw_get_sopt_space(dta->sd, sizeof(*i)); 2133272840Smelifaro KASSERT(i != 0, ("previously checked buffer is not enough")); 2134272840Smelifaro 2135272840Smelifaro export_table_info(dta->ch, (struct table_config *)no, i); 2136272840Smelifaro} 2137272840Smelifaro 2138272840Smelifaro/* 2139272840Smelifaro * Export all tables as ipfw_xtable_info structures to 2140272840Smelifaro * storage provided by @sd. 2141272840Smelifaro * 2142272840Smelifaro * If supplied buffer is too small, fills in required size 2143272840Smelifaro * and returns ENOMEM. 2144272840Smelifaro * Returns 0 on success. 2145272840Smelifaro */ 2146272840Smelifarostatic int 2147272840Smelifaroexport_tables(struct ip_fw_chain *ch, ipfw_obj_lheader *olh, 2148272840Smelifaro struct sockopt_data *sd) 2149272840Smelifaro{ 2150272840Smelifaro uint32_t size; 2151272840Smelifaro uint32_t count; 2152272840Smelifaro struct dump_table_args dta; 2153272840Smelifaro 2154272840Smelifaro count = ipfw_objhash_count(CHAIN_TO_NI(ch)); 2155272840Smelifaro size = count * sizeof(ipfw_xtable_info) + sizeof(ipfw_obj_lheader); 2156272840Smelifaro 2157272840Smelifaro /* Fill in header regadless of buffer size */ 2158272840Smelifaro olh->count = count; 2159272840Smelifaro olh->objsize = sizeof(ipfw_xtable_info); 2160272840Smelifaro 2161272840Smelifaro if (size > olh->size) { 2162272840Smelifaro olh->size = size; 2163272840Smelifaro return (ENOMEM); 2164272840Smelifaro } 2165272840Smelifaro 2166272840Smelifaro olh->size = size; 2167272840Smelifaro 2168272840Smelifaro dta.ch = ch; 2169272840Smelifaro dta.sd = sd; 2170272840Smelifaro 2171272840Smelifaro ipfw_objhash_foreach(CHAIN_TO_NI(ch), export_table_internal, &dta); 2172272840Smelifaro 2173272840Smelifaro return (0); 2174272840Smelifaro} 2175272840Smelifaro 2176272840Smelifaro/* 2177272840Smelifaro * Dumps all table data 2178272840Smelifaro * Data layout (v1)(current): 2179272840Smelifaro * Request: [ ipfw_obj_header ], size = ipfw_xtable_info.size 2180272840Smelifaro * Reply: [ ipfw_obj_header ipfw_xtable_info ipfw_obj_tentry x N ] 2181272840Smelifaro * 2182272840Smelifaro * Returns 0 on success 2183272840Smelifaro */ 2184272840Smelifarostatic int 2185272840Smelifarodump_table_v1(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 2186272840Smelifaro struct sockopt_data *sd) 2187272840Smelifaro{ 2188272840Smelifaro struct _ipfw_obj_header *oh; 2189272840Smelifaro ipfw_xtable_info *i; 2190272840Smelifaro struct tid_info ti; 2191272840Smelifaro struct table_config *tc; 2192272840Smelifaro struct table_algo *ta; 2193272840Smelifaro struct dump_args da; 2194272840Smelifaro uint32_t sz; 2195272840Smelifaro 2196272840Smelifaro sz = sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info); 2197272840Smelifaro oh = (struct _ipfw_obj_header *)ipfw_get_sopt_header(sd, sz); 2198272840Smelifaro if (oh == NULL) 2199200590Sluigi return (EINVAL); 2200272840Smelifaro 2201272840Smelifaro i = (ipfw_xtable_info *)(oh + 1); 2202272840Smelifaro objheader_to_ti(oh, &ti); 2203272840Smelifaro 2204272840Smelifaro IPFW_UH_RLOCK(ch); 2205272840Smelifaro if ((tc = find_table(CHAIN_TO_NI(ch), &ti)) == NULL) { 2206272840Smelifaro IPFW_UH_RUNLOCK(ch); 2207272840Smelifaro return (ESRCH); 2208272840Smelifaro } 2209272840Smelifaro export_table_info(ch, tc, i); 2210272840Smelifaro 2211272840Smelifaro if (sd->valsize < i->size) { 2212272840Smelifaro 2213272840Smelifaro /* 2214272840Smelifaro * Submitted buffer size is not enough. 2215272840Smelifaro * WE've already filled in @i structure with 2216272840Smelifaro * relevant table info including size, so we 2217272840Smelifaro * can return. Buffer will be flushed automatically. 2218272840Smelifaro */ 2219272840Smelifaro IPFW_UH_RUNLOCK(ch); 2220272840Smelifaro return (ENOMEM); 2221272840Smelifaro } 2222272840Smelifaro 2223272840Smelifaro /* 2224272840Smelifaro * Do the actual dump in eXtended format 2225272840Smelifaro */ 2226272840Smelifaro memset(&da, 0, sizeof(da)); 2227272840Smelifaro da.ch = ch; 2228272840Smelifaro da.ti = KIDX_TO_TI(ch, tc->no.kidx); 2229272840Smelifaro da.tc = tc; 2230272840Smelifaro da.sd = sd; 2231272840Smelifaro 2232272840Smelifaro ta = tc->ta; 2233272840Smelifaro 2234272840Smelifaro ta->foreach(tc->astate, da.ti, dump_table_tentry, &da); 2235272840Smelifaro IPFW_UH_RUNLOCK(ch); 2236272840Smelifaro 2237272840Smelifaro return (da.error); 2238272840Smelifaro} 2239272840Smelifaro 2240272840Smelifaro/* 2241272840Smelifaro * Dumps all table data 2242272840Smelifaro * Data layout (version 0)(legacy): 2243272840Smelifaro * Request: [ ipfw_xtable ], size = IP_FW_TABLE_XGETSIZE() 2244272840Smelifaro * Reply: [ ipfw_xtable ipfw_table_xentry x N ] 2245272840Smelifaro * 2246272840Smelifaro * Returns 0 on success 2247272840Smelifaro */ 2248272840Smelifarostatic int 2249272840Smelifarodump_table_v0(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 2250272840Smelifaro struct sockopt_data *sd) 2251272840Smelifaro{ 2252272840Smelifaro ipfw_xtable *xtbl; 2253272840Smelifaro struct tid_info ti; 2254272840Smelifaro struct table_config *tc; 2255272840Smelifaro struct table_algo *ta; 2256272840Smelifaro struct dump_args da; 2257272840Smelifaro size_t sz, count; 2258272840Smelifaro 2259272840Smelifaro xtbl = (ipfw_xtable *)ipfw_get_sopt_header(sd, sizeof(ipfw_xtable)); 2260272840Smelifaro if (xtbl == NULL) 2261272840Smelifaro return (EINVAL); 2262272840Smelifaro 2263272840Smelifaro memset(&ti, 0, sizeof(ti)); 2264272840Smelifaro ti.uidx = xtbl->tbl; 2265272840Smelifaro 2266272840Smelifaro IPFW_UH_RLOCK(ch); 2267272840Smelifaro if ((tc = find_table(CHAIN_TO_NI(ch), &ti)) == NULL) { 2268272840Smelifaro IPFW_UH_RUNLOCK(ch); 2269232865Smelifaro return (0); 2270272840Smelifaro } 2271272840Smelifaro count = table_get_count(ch, tc); 2272272840Smelifaro sz = count * sizeof(ipfw_table_xentry) + sizeof(ipfw_xtable); 2273272840Smelifaro 2274272840Smelifaro xtbl->cnt = count; 2275272840Smelifaro xtbl->size = sz; 2276282070Smelifaro xtbl->type = tc->no.subtype; 2277272840Smelifaro xtbl->tbl = ti.uidx; 2278272840Smelifaro 2279272840Smelifaro if (sd->valsize < sz) { 2280272840Smelifaro 2281272840Smelifaro /* 2282272840Smelifaro * Submitted buffer size is not enough. 2283272840Smelifaro * WE've already filled in @i structure with 2284272840Smelifaro * relevant table info including size, so we 2285272840Smelifaro * can return. Buffer will be flushed automatically. 2286272840Smelifaro */ 2287272840Smelifaro IPFW_UH_RUNLOCK(ch); 2288272840Smelifaro return (ENOMEM); 2289272840Smelifaro } 2290272840Smelifaro 2291272840Smelifaro /* Do the actual dump in eXtended format */ 2292272840Smelifaro memset(&da, 0, sizeof(da)); 2293272840Smelifaro da.ch = ch; 2294272840Smelifaro da.ti = KIDX_TO_TI(ch, tc->no.kidx); 2295272840Smelifaro da.tc = tc; 2296272840Smelifaro da.sd = sd; 2297272840Smelifaro 2298272840Smelifaro ta = tc->ta; 2299272840Smelifaro 2300272840Smelifaro ta->foreach(tc->astate, da.ti, dump_table_xentry, &da); 2301272840Smelifaro IPFW_UH_RUNLOCK(ch); 2302272840Smelifaro 2303200590Sluigi return (0); 2304200590Sluigi} 2305200590Sluigi 2306272840Smelifaro/* 2307272840Smelifaro * Legacy function to retrieve number of items in table. 2308272840Smelifaro */ 2309200590Sluigistatic int 2310272840Smelifaroget_table_size(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 2311272840Smelifaro struct sockopt_data *sd) 2312200590Sluigi{ 2313272840Smelifaro uint32_t *tbl; 2314272840Smelifaro struct tid_info ti; 2315272840Smelifaro size_t sz; 2316272840Smelifaro int error; 2317200590Sluigi 2318272840Smelifaro sz = sizeof(*op3) + sizeof(uint32_t); 2319272840Smelifaro op3 = (ip_fw3_opheader *)ipfw_get_sopt_header(sd, sz); 2320272840Smelifaro if (op3 == NULL) 2321272840Smelifaro return (EINVAL); 2322272840Smelifaro 2323272840Smelifaro tbl = (uint32_t *)(op3 + 1); 2324272840Smelifaro memset(&ti, 0, sizeof(ti)); 2325272840Smelifaro ti.uidx = *tbl; 2326272840Smelifaro IPFW_UH_RLOCK(ch); 2327272840Smelifaro error = ipfw_count_xtable(ch, &ti, tbl); 2328272840Smelifaro IPFW_UH_RUNLOCK(ch); 2329272840Smelifaro return (error); 2330272840Smelifaro} 2331272840Smelifaro 2332272840Smelifaro/* 2333272840Smelifaro * Legacy IP_FW_TABLE_GETSIZE handler 2334272840Smelifaro */ 2335272840Smelifaroint 2336272840Smelifaroipfw_count_table(struct ip_fw_chain *ch, struct tid_info *ti, uint32_t *cnt) 2337272840Smelifaro{ 2338272840Smelifaro struct table_config *tc; 2339272840Smelifaro 2340272840Smelifaro if ((tc = find_table(CHAIN_TO_NI(ch), ti)) == NULL) 2341272840Smelifaro return (ESRCH); 2342272840Smelifaro *cnt = table_get_count(ch, tc); 2343200590Sluigi return (0); 2344200590Sluigi} 2345200590Sluigi 2346272840Smelifaro/* 2347272840Smelifaro * Legacy IP_FW_TABLE_XGETSIZE handler 2348272840Smelifaro */ 2349200590Sluigiint 2350272840Smelifaroipfw_count_xtable(struct ip_fw_chain *ch, struct tid_info *ti, uint32_t *cnt) 2351200590Sluigi{ 2352272840Smelifaro struct table_config *tc; 2353272840Smelifaro uint32_t count; 2354200590Sluigi 2355272840Smelifaro if ((tc = find_table(CHAIN_TO_NI(ch), ti)) == NULL) { 2356272840Smelifaro *cnt = 0; 2357272840Smelifaro return (0); /* 'table all list' requires success */ 2358272840Smelifaro } 2359272840Smelifaro 2360272840Smelifaro count = table_get_count(ch, tc); 2361272840Smelifaro *cnt = count * sizeof(ipfw_table_xentry); 2362272840Smelifaro if (count > 0) 2363272840Smelifaro *cnt += sizeof(ipfw_xtable); 2364200590Sluigi return (0); 2365200590Sluigi} 2366232865Smelifaro 2367232865Smelifarostatic int 2368272840Smelifarodump_table_entry(void *e, void *arg) 2369232865Smelifaro{ 2370272840Smelifaro struct dump_args *da; 2371272840Smelifaro struct table_config *tc; 2372272840Smelifaro struct table_algo *ta; 2373272840Smelifaro ipfw_table_entry *ent; 2374272840Smelifaro struct table_value *pval; 2375272840Smelifaro int error; 2376232865Smelifaro 2377272840Smelifaro da = (struct dump_args *)arg; 2378272840Smelifaro 2379272840Smelifaro tc = da->tc; 2380272840Smelifaro ta = tc->ta; 2381272840Smelifaro 2382272840Smelifaro /* Out of memory, returning */ 2383272840Smelifaro if (da->cnt == da->size) 2384272840Smelifaro return (1); 2385272840Smelifaro ent = da->ent++; 2386272840Smelifaro ent->tbl = da->uidx; 2387272840Smelifaro da->cnt++; 2388272840Smelifaro 2389272840Smelifaro error = ta->dump_tentry(tc->astate, da->ti, e, &da->tent); 2390272840Smelifaro if (error != 0) 2391272840Smelifaro return (error); 2392272840Smelifaro 2393272840Smelifaro ent->addr = da->tent.k.addr.s_addr; 2394272840Smelifaro ent->masklen = da->tent.masklen; 2395272840Smelifaro pval = get_table_value(da->ch, da->tc, da->tent.v.kidx); 2396272840Smelifaro ent->value = ipfw_export_table_value_legacy(pval); 2397272840Smelifaro 2398232865Smelifaro return (0); 2399232865Smelifaro} 2400232865Smelifaro 2401272840Smelifaro/* 2402272840Smelifaro * Dumps table in pre-8.1 legacy format. 2403272840Smelifaro */ 2404232865Smelifaroint 2405272840Smelifaroipfw_dump_table_legacy(struct ip_fw_chain *ch, struct tid_info *ti, 2406272840Smelifaro ipfw_table *tbl) 2407232865Smelifaro{ 2408272840Smelifaro struct table_config *tc; 2409272840Smelifaro struct table_algo *ta; 2410272840Smelifaro struct dump_args da; 2411232865Smelifaro 2412272840Smelifaro tbl->cnt = 0; 2413272840Smelifaro 2414272840Smelifaro if ((tc = find_table(CHAIN_TO_NI(ch), ti)) == NULL) 2415272840Smelifaro return (0); /* XXX: We should return ESRCH */ 2416272840Smelifaro 2417272840Smelifaro ta = tc->ta; 2418272840Smelifaro 2419272840Smelifaro /* This dump format supports IPv4 only */ 2420282070Smelifaro if (tc->no.subtype != IPFW_TABLE_ADDR) 2421272840Smelifaro return (0); 2422272840Smelifaro 2423272840Smelifaro memset(&da, 0, sizeof(da)); 2424272840Smelifaro da.ch = ch; 2425272840Smelifaro da.ti = KIDX_TO_TI(ch, tc->no.kidx); 2426272840Smelifaro da.tc = tc; 2427272840Smelifaro da.ent = &tbl->ent[0]; 2428272840Smelifaro da.size = tbl->size; 2429272840Smelifaro 2430272840Smelifaro tbl->cnt = 0; 2431272840Smelifaro ta->foreach(tc->astate, da.ti, dump_table_entry, &da); 2432272840Smelifaro tbl->cnt = da.cnt; 2433272840Smelifaro 2434232865Smelifaro return (0); 2435232865Smelifaro} 2436232865Smelifaro 2437272840Smelifaro/* 2438272840Smelifaro * Dumps table entry in eXtended format (v1)(current). 2439272840Smelifaro */ 2440232865Smelifarostatic int 2441272840Smelifarodump_table_tentry(void *e, void *arg) 2442232865Smelifaro{ 2443272840Smelifaro struct dump_args *da; 2444272840Smelifaro struct table_config *tc; 2445272840Smelifaro struct table_algo *ta; 2446272840Smelifaro struct table_value *pval; 2447272840Smelifaro ipfw_obj_tentry *tent; 2448272840Smelifaro int error; 2449232865Smelifaro 2450272840Smelifaro da = (struct dump_args *)arg; 2451272840Smelifaro 2452272840Smelifaro tc = da->tc; 2453272840Smelifaro ta = tc->ta; 2454272840Smelifaro 2455272840Smelifaro tent = (ipfw_obj_tentry *)ipfw_get_sopt_space(da->sd, sizeof(*tent)); 2456232865Smelifaro /* Out of memory, returning */ 2457272840Smelifaro if (tent == NULL) { 2458272840Smelifaro da->error = ENOMEM; 2459232865Smelifaro return (1); 2460272840Smelifaro } 2461272840Smelifaro tent->head.length = sizeof(ipfw_obj_tentry); 2462272840Smelifaro tent->idx = da->uidx; 2463272840Smelifaro 2464272840Smelifaro error = ta->dump_tentry(tc->astate, da->ti, e, tent); 2465272840Smelifaro if (error != 0) 2466272840Smelifaro return (error); 2467272840Smelifaro 2468272840Smelifaro pval = get_table_value(da->ch, da->tc, tent->v.kidx); 2469272840Smelifaro ipfw_export_table_value_v1(pval, &tent->v.value); 2470272840Smelifaro 2471232865Smelifaro return (0); 2472232865Smelifaro} 2473232865Smelifaro 2474272840Smelifaro/* 2475272840Smelifaro * Dumps table entry in eXtended format (v0). 2476272840Smelifaro */ 2477232865Smelifarostatic int 2478272840Smelifarodump_table_xentry(void *e, void *arg) 2479232865Smelifaro{ 2480272840Smelifaro struct dump_args *da; 2481272840Smelifaro struct table_config *tc; 2482272840Smelifaro struct table_algo *ta; 2483232865Smelifaro ipfw_table_xentry *xent; 2484272840Smelifaro ipfw_obj_tentry *tent; 2485272840Smelifaro struct table_value *pval; 2486272840Smelifaro int error; 2487272840Smelifaro 2488272840Smelifaro da = (struct dump_args *)arg; 2489272840Smelifaro 2490272840Smelifaro tc = da->tc; 2491272840Smelifaro ta = tc->ta; 2492272840Smelifaro 2493272840Smelifaro xent = (ipfw_table_xentry *)ipfw_get_sopt_space(da->sd, sizeof(*xent)); 2494232865Smelifaro /* Out of memory, returning */ 2495272840Smelifaro if (xent == NULL) 2496232865Smelifaro return (1); 2497232865Smelifaro xent->len = sizeof(ipfw_table_xentry); 2498272840Smelifaro xent->tbl = da->uidx; 2499232865Smelifaro 2500272840Smelifaro memset(&da->tent, 0, sizeof(da->tent)); 2501272840Smelifaro tent = &da->tent; 2502272840Smelifaro error = ta->dump_tentry(tc->astate, da->ti, e, tent); 2503272840Smelifaro if (error != 0) 2504272840Smelifaro return (error); 2505272840Smelifaro 2506272840Smelifaro /* Convert current format to previous one */ 2507272840Smelifaro xent->masklen = tent->masklen; 2508272840Smelifaro pval = get_table_value(da->ch, da->tc, da->tent.v.kidx); 2509272840Smelifaro xent->value = ipfw_export_table_value_legacy(pval); 2510272840Smelifaro /* Apply some hacks */ 2511282070Smelifaro if (tc->no.subtype == IPFW_TABLE_ADDR && tent->subtype == AF_INET) { 2512272840Smelifaro xent->k.addr6.s6_addr32[3] = tent->k.addr.s_addr; 2513272840Smelifaro xent->flags = IPFW_TCF_INET; 2514272840Smelifaro } else 2515272840Smelifaro memcpy(&xent->k, &tent->k, sizeof(xent->k)); 2516272840Smelifaro 2517272840Smelifaro return (0); 2518272840Smelifaro} 2519272840Smelifaro 2520272840Smelifaro/* 2521272840Smelifaro * Helper function to export table algo data 2522272840Smelifaro * to tentry format before calling user function. 2523272840Smelifaro * 2524272840Smelifaro * Returns 0 on success. 2525272840Smelifaro */ 2526272840Smelifarostatic int 2527272840Smelifaroprepare_table_tentry(void *e, void *arg) 2528272840Smelifaro{ 2529272840Smelifaro struct dump_args *da; 2530272840Smelifaro struct table_config *tc; 2531272840Smelifaro struct table_algo *ta; 2532272840Smelifaro int error; 2533272840Smelifaro 2534272840Smelifaro da = (struct dump_args *)arg; 2535272840Smelifaro 2536272840Smelifaro tc = da->tc; 2537272840Smelifaro ta = tc->ta; 2538272840Smelifaro 2539272840Smelifaro error = ta->dump_tentry(tc->astate, da->ti, e, &da->tent); 2540272840Smelifaro if (error != 0) 2541272840Smelifaro return (error); 2542272840Smelifaro 2543272840Smelifaro da->f(&da->tent, da->farg); 2544272840Smelifaro 2545272840Smelifaro return (0); 2546272840Smelifaro} 2547272840Smelifaro 2548272840Smelifaro/* 2549272840Smelifaro * Allow external consumers to read table entries in standard format. 2550272840Smelifaro */ 2551272840Smelifaroint 2552272840Smelifaroipfw_foreach_table_tentry(struct ip_fw_chain *ch, uint16_t kidx, 2553272840Smelifaro ta_foreach_f *f, void *arg) 2554272840Smelifaro{ 2555272840Smelifaro struct namedobj_instance *ni; 2556272840Smelifaro struct table_config *tc; 2557272840Smelifaro struct table_algo *ta; 2558272840Smelifaro struct dump_args da; 2559272840Smelifaro 2560272840Smelifaro ni = CHAIN_TO_NI(ch); 2561272840Smelifaro 2562272840Smelifaro tc = (struct table_config *)ipfw_objhash_lookup_kidx(ni, kidx); 2563272840Smelifaro if (tc == NULL) 2564272840Smelifaro return (ESRCH); 2565272840Smelifaro 2566272840Smelifaro ta = tc->ta; 2567272840Smelifaro 2568272840Smelifaro memset(&da, 0, sizeof(da)); 2569272840Smelifaro da.ch = ch; 2570272840Smelifaro da.ti = KIDX_TO_TI(ch, tc->no.kidx); 2571272840Smelifaro da.tc = tc; 2572272840Smelifaro da.f = f; 2573272840Smelifaro da.farg = arg; 2574272840Smelifaro 2575272840Smelifaro ta->foreach(tc->astate, da.ti, prepare_table_tentry, &da); 2576272840Smelifaro 2577272840Smelifaro return (0); 2578272840Smelifaro} 2579272840Smelifaro 2580272840Smelifaro/* 2581272840Smelifaro * Table algorithms 2582272840Smelifaro */ 2583272840Smelifaro 2584272840Smelifaro/* 2585272840Smelifaro * Finds algoritm by index, table type or supplied name. 2586272840Smelifaro * 2587272840Smelifaro * Returns pointer to algo or NULL. 2588272840Smelifaro */ 2589272840Smelifarostatic struct table_algo * 2590272840Smelifarofind_table_algo(struct tables_config *tcfg, struct tid_info *ti, char *name) 2591272840Smelifaro{ 2592272840Smelifaro int i, l; 2593272840Smelifaro struct table_algo *ta; 2594272840Smelifaro 2595272840Smelifaro if (ti->type > IPFW_TABLE_MAXTYPE) 2596272840Smelifaro return (NULL); 2597272840Smelifaro 2598272840Smelifaro /* Search by index */ 2599272840Smelifaro if (ti->atype != 0) { 2600272840Smelifaro if (ti->atype > tcfg->algo_count) 2601272840Smelifaro return (NULL); 2602272840Smelifaro return (tcfg->algo[ti->atype]); 2603272840Smelifaro } 2604272840Smelifaro 2605272840Smelifaro if (name == NULL) { 2606272840Smelifaro /* Return default algorithm for given type if set */ 2607272840Smelifaro return (tcfg->def_algo[ti->type]); 2608272840Smelifaro } 2609272840Smelifaro 2610272840Smelifaro /* Search by name */ 2611272840Smelifaro /* TODO: better search */ 2612272840Smelifaro for (i = 1; i <= tcfg->algo_count; i++) { 2613272840Smelifaro ta = tcfg->algo[i]; 2614272840Smelifaro 2615272840Smelifaro /* 2616272840Smelifaro * One can supply additional algorithm 2617272840Smelifaro * parameters so we compare only the first word 2618272840Smelifaro * of supplied name: 2619272840Smelifaro * 'addr:chash hsize=32' 2620272840Smelifaro * '^^^^^^^^^' 2621272840Smelifaro * 2622272840Smelifaro */ 2623272840Smelifaro l = strlen(ta->name); 2624272840Smelifaro if (strncmp(name, ta->name, l) != 0) 2625272840Smelifaro continue; 2626272840Smelifaro if (name[l] != '\0' && name[l] != ' ') 2627272840Smelifaro continue; 2628272840Smelifaro /* Check if we're requesting proper table type */ 2629272840Smelifaro if (ti->type != 0 && ti->type != ta->type) 2630272840Smelifaro return (NULL); 2631272840Smelifaro return (ta); 2632272840Smelifaro } 2633272840Smelifaro 2634272840Smelifaro return (NULL); 2635272840Smelifaro} 2636272840Smelifaro 2637272840Smelifaro/* 2638272840Smelifaro * Register new table algo @ta. 2639272840Smelifaro * Stores algo id inside @idx. 2640272840Smelifaro * 2641272840Smelifaro * Returns 0 on success. 2642272840Smelifaro */ 2643272840Smelifaroint 2644272840Smelifaroipfw_add_table_algo(struct ip_fw_chain *ch, struct table_algo *ta, size_t size, 2645272840Smelifaro int *idx) 2646272840Smelifaro{ 2647272840Smelifaro struct tables_config *tcfg; 2648272840Smelifaro struct table_algo *ta_new; 2649272840Smelifaro size_t sz; 2650272840Smelifaro 2651272840Smelifaro if (size > sizeof(struct table_algo)) 2652272840Smelifaro return (EINVAL); 2653272840Smelifaro 2654272840Smelifaro /* Check for the required on-stack size for add/del */ 2655272840Smelifaro sz = roundup2(ta->ta_buf_size, sizeof(void *)); 2656272840Smelifaro if (sz > TA_BUF_SZ) 2657272840Smelifaro return (EINVAL); 2658272840Smelifaro 2659272840Smelifaro KASSERT(ta->type <= IPFW_TABLE_MAXTYPE,("Increase IPFW_TABLE_MAXTYPE")); 2660272840Smelifaro 2661272840Smelifaro /* Copy algorithm data to stable storage. */ 2662272840Smelifaro ta_new = malloc(sizeof(struct table_algo), M_IPFW, M_WAITOK | M_ZERO); 2663272840Smelifaro memcpy(ta_new, ta, size); 2664272840Smelifaro 2665272840Smelifaro tcfg = CHAIN_TO_TCFG(ch); 2666272840Smelifaro 2667272840Smelifaro KASSERT(tcfg->algo_count < 255, ("Increase algo array size")); 2668272840Smelifaro 2669272840Smelifaro tcfg->algo[++tcfg->algo_count] = ta_new; 2670272840Smelifaro ta_new->idx = tcfg->algo_count; 2671272840Smelifaro 2672272840Smelifaro /* Set algorithm as default one for given type */ 2673272840Smelifaro if ((ta_new->flags & TA_FLAG_DEFAULT) != 0 && 2674272840Smelifaro tcfg->def_algo[ta_new->type] == NULL) 2675272840Smelifaro tcfg->def_algo[ta_new->type] = ta_new; 2676272840Smelifaro 2677272840Smelifaro *idx = ta_new->idx; 2678232865Smelifaro 2679272840Smelifaro return (0); 2680272840Smelifaro} 2681272840Smelifaro 2682272840Smelifaro/* 2683272840Smelifaro * Unregisters table algo using @idx as id. 2684272840Smelifaro * XXX: It is NOT safe to call this function in any place 2685272840Smelifaro * other than ipfw instance destroy handler. 2686272840Smelifaro */ 2687272840Smelifarovoid 2688272840Smelifaroipfw_del_table_algo(struct ip_fw_chain *ch, int idx) 2689272840Smelifaro{ 2690272840Smelifaro struct tables_config *tcfg; 2691272840Smelifaro struct table_algo *ta; 2692272840Smelifaro 2693272840Smelifaro tcfg = CHAIN_TO_TCFG(ch); 2694272840Smelifaro 2695272840Smelifaro KASSERT(idx <= tcfg->algo_count, ("algo idx %d out of range 1..%d", 2696272840Smelifaro idx, tcfg->algo_count)); 2697272840Smelifaro 2698272840Smelifaro ta = tcfg->algo[idx]; 2699272840Smelifaro KASSERT(ta != NULL, ("algo idx %d is NULL", idx)); 2700272840Smelifaro 2701272840Smelifaro if (tcfg->def_algo[ta->type] == ta) 2702272840Smelifaro tcfg->def_algo[ta->type] = NULL; 2703272840Smelifaro 2704272840Smelifaro free(ta, M_IPFW); 2705272840Smelifaro} 2706272840Smelifaro 2707272840Smelifaro/* 2708272840Smelifaro * Lists all table algorithms currently available. 2709272840Smelifaro * Data layout (v0)(current): 2710272840Smelifaro * Request: [ ipfw_obj_lheader ], size = ipfw_obj_lheader.size 2711272840Smelifaro * Reply: [ ipfw_obj_lheader ipfw_ta_info x N ] 2712272840Smelifaro * 2713272840Smelifaro * Returns 0 on success 2714272840Smelifaro */ 2715272840Smelifarostatic int 2716272840Smelifarolist_table_algo(struct ip_fw_chain *ch, ip_fw3_opheader *op3, 2717272840Smelifaro struct sockopt_data *sd) 2718272840Smelifaro{ 2719272840Smelifaro struct _ipfw_obj_lheader *olh; 2720272840Smelifaro struct tables_config *tcfg; 2721272840Smelifaro ipfw_ta_info *i; 2722272840Smelifaro struct table_algo *ta; 2723272840Smelifaro uint32_t count, n, size; 2724272840Smelifaro 2725272840Smelifaro olh = (struct _ipfw_obj_lheader *)ipfw_get_sopt_header(sd,sizeof(*olh)); 2726272840Smelifaro if (olh == NULL) 2727272840Smelifaro return (EINVAL); 2728272840Smelifaro if (sd->valsize < olh->size) 2729272840Smelifaro return (EINVAL); 2730272840Smelifaro 2731272840Smelifaro IPFW_UH_RLOCK(ch); 2732272840Smelifaro tcfg = CHAIN_TO_TCFG(ch); 2733272840Smelifaro count = tcfg->algo_count; 2734272840Smelifaro size = count * sizeof(ipfw_ta_info) + sizeof(ipfw_obj_lheader); 2735272840Smelifaro 2736272840Smelifaro /* Fill in header regadless of buffer size */ 2737272840Smelifaro olh->count = count; 2738272840Smelifaro olh->objsize = sizeof(ipfw_ta_info); 2739272840Smelifaro 2740272840Smelifaro if (size > olh->size) { 2741272840Smelifaro olh->size = size; 2742272840Smelifaro IPFW_UH_RUNLOCK(ch); 2743272840Smelifaro return (ENOMEM); 2744232865Smelifaro } 2745272840Smelifaro olh->size = size; 2746232865Smelifaro 2747272840Smelifaro for (n = 1; n <= count; n++) { 2748272840Smelifaro i = (ipfw_ta_info *)ipfw_get_sopt_space(sd, sizeof(*i)); 2749272840Smelifaro KASSERT(i != 0, ("previously checked buffer is not enough")); 2750272840Smelifaro ta = tcfg->algo[n]; 2751272840Smelifaro strlcpy(i->algoname, ta->name, sizeof(i->algoname)); 2752272840Smelifaro i->type = ta->type; 2753272840Smelifaro i->refcnt = ta->refcnt; 2754272840Smelifaro } 2755272840Smelifaro 2756272840Smelifaro IPFW_UH_RUNLOCK(ch); 2757272840Smelifaro 2758232865Smelifaro return (0); 2759232865Smelifaro} 2760232865Smelifaro 2761282070Smelifarostatic int 2762282070Smelifaroclassify_srcdst(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype) 2763282070Smelifaro{ 2764282070Smelifaro /* Basic IPv4/IPv6 or u32 lookups */ 2765282070Smelifaro *puidx = cmd->arg1; 2766282070Smelifaro /* Assume ADDR by default */ 2767282070Smelifaro *ptype = IPFW_TABLE_ADDR; 2768282070Smelifaro int v; 2769282070Smelifaro 2770282070Smelifaro if (F_LEN(cmd) > F_INSN_SIZE(ipfw_insn_u32)) { 2771282070Smelifaro /* 2772282070Smelifaro * generic lookup. The key must be 2773282070Smelifaro * in 32bit big-endian format. 2774282070Smelifaro */ 2775282070Smelifaro v = ((ipfw_insn_u32 *)cmd)->d[1]; 2776282070Smelifaro switch (v) { 2777282070Smelifaro case 0: 2778282070Smelifaro case 1: 2779282070Smelifaro /* IPv4 src/dst */ 2780282070Smelifaro break; 2781282070Smelifaro case 2: 2782282070Smelifaro case 3: 2783282070Smelifaro /* src/dst port */ 2784282070Smelifaro *ptype = IPFW_TABLE_NUMBER; 2785282070Smelifaro break; 2786282070Smelifaro case 4: 2787282070Smelifaro /* uid/gid */ 2788282070Smelifaro *ptype = IPFW_TABLE_NUMBER; 2789282070Smelifaro break; 2790282070Smelifaro case 5: 2791282070Smelifaro /* jid */ 2792282070Smelifaro *ptype = IPFW_TABLE_NUMBER; 2793282070Smelifaro break; 2794282070Smelifaro case 6: 2795282070Smelifaro /* dscp */ 2796282070Smelifaro *ptype = IPFW_TABLE_NUMBER; 2797282070Smelifaro break; 2798282070Smelifaro } 2799282070Smelifaro } 2800272840Smelifaro 2801282070Smelifaro return (0); 2802282070Smelifaro} 2803282070Smelifaro 2804272840Smelifarostatic int 2805282070Smelifaroclassify_via(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype) 2806272840Smelifaro{ 2807272840Smelifaro ipfw_insn_if *cmdif; 2808272840Smelifaro 2809282070Smelifaro /* Interface table, possibly */ 2810282070Smelifaro cmdif = (ipfw_insn_if *)cmd; 2811282070Smelifaro if (cmdif->name[0] != '\1') 2812282070Smelifaro return (1); 2813272840Smelifaro 2814282070Smelifaro *ptype = IPFW_TABLE_INTERFACE; 2815282070Smelifaro *puidx = cmdif->p.kidx; 2816272840Smelifaro 2817282070Smelifaro return (0); 2818282070Smelifaro} 2819272840Smelifaro 2820282070Smelifarostatic int 2821282070Smelifaroclassify_flow(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype) 2822282070Smelifaro{ 2823282070Smelifaro 2824282070Smelifaro *puidx = cmd->arg1; 2825282070Smelifaro *ptype = IPFW_TABLE_FLOW; 2826282070Smelifaro 2827282070Smelifaro return (0); 2828272840Smelifaro} 2829272840Smelifaro 2830272840Smelifarostatic void 2831282070Smelifaroupdate_arg1(ipfw_insn *cmd, uint16_t idx) 2832272840Smelifaro{ 2833282070Smelifaro 2834282070Smelifaro cmd->arg1 = idx; 2835282070Smelifaro} 2836282070Smelifaro 2837282070Smelifarostatic void 2838282070Smelifaroupdate_via(ipfw_insn *cmd, uint16_t idx) 2839282070Smelifaro{ 2840272840Smelifaro ipfw_insn_if *cmdif; 2841272840Smelifaro 2842282070Smelifaro cmdif = (ipfw_insn_if *)cmd; 2843282070Smelifaro cmdif->p.kidx = idx; 2844272840Smelifaro} 2845272840Smelifaro 2846282070Smelifarostatic int 2847282070Smelifarotable_findbyname(struct ip_fw_chain *ch, struct tid_info *ti, 2848282070Smelifaro struct named_object **pno) 2849282070Smelifaro{ 2850282070Smelifaro struct table_config *tc; 2851282070Smelifaro int error; 2852282070Smelifaro 2853282070Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 2854282070Smelifaro 2855282070Smelifaro error = find_table_err(CHAIN_TO_NI(ch), ti, &tc); 2856282070Smelifaro if (error != 0) 2857282070Smelifaro return (error); 2858282070Smelifaro 2859282070Smelifaro *pno = &tc->no; 2860282070Smelifaro return (0); 2861282070Smelifaro} 2862282070Smelifaro 2863282070Smelifaro/* XXX: sets-sets! */ 2864282070Smelifarostatic struct named_object * 2865282070Smelifarotable_findbykidx(struct ip_fw_chain *ch, uint16_t idx) 2866282070Smelifaro{ 2867282070Smelifaro struct namedobj_instance *ni; 2868282070Smelifaro struct table_config *tc; 2869282070Smelifaro 2870282070Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 2871282070Smelifaro ni = CHAIN_TO_NI(ch); 2872282070Smelifaro tc = (struct table_config *)ipfw_objhash_lookup_kidx(ni, idx); 2873282070Smelifaro KASSERT(tc != NULL, ("Table with index %d not found", idx)); 2874282070Smelifaro 2875282070Smelifaro return (&tc->no); 2876282070Smelifaro} 2877282070Smelifaro 2878282070Smelifarostatic struct opcode_obj_rewrite opcodes[] = { 2879282070Smelifaro { 2880282070Smelifaro O_IP_SRC_LOOKUP, IPFW_TLV_TBL_NAME, 2881282070Smelifaro classify_srcdst, update_arg1, 2882282070Smelifaro table_findbyname, table_findbykidx, create_table_compat 2883282070Smelifaro }, 2884282070Smelifaro { 2885282070Smelifaro O_IP_DST_LOOKUP, IPFW_TLV_TBL_NAME, 2886282070Smelifaro classify_srcdst, update_arg1, 2887282070Smelifaro table_findbyname, table_findbykidx, create_table_compat 2888282070Smelifaro }, 2889282070Smelifaro { 2890282070Smelifaro O_IP_FLOW_LOOKUP, IPFW_TLV_TBL_NAME, 2891282070Smelifaro classify_flow, update_arg1, 2892282070Smelifaro table_findbyname, table_findbykidx, create_table_compat 2893282070Smelifaro }, 2894282070Smelifaro { 2895282070Smelifaro O_XMIT, IPFW_TLV_TBL_NAME, 2896282070Smelifaro classify_via, update_via, 2897282070Smelifaro table_findbyname, table_findbykidx, create_table_compat 2898282070Smelifaro }, 2899282070Smelifaro { 2900282070Smelifaro O_RECV, IPFW_TLV_TBL_NAME, 2901282070Smelifaro classify_via, update_via, 2902282070Smelifaro table_findbyname, table_findbykidx, create_table_compat 2903282070Smelifaro }, 2904282070Smelifaro { 2905282070Smelifaro O_VIA, IPFW_TLV_TBL_NAME, 2906282070Smelifaro classify_via, update_via, 2907282070Smelifaro table_findbyname, table_findbykidx, create_table_compat 2908282070Smelifaro }, 2909282070Smelifaro}; 2910282070Smelifaro 2911282070Smelifaro 2912272840Smelifaro/* 2913272840Smelifaro * Checks table name for validity. 2914272840Smelifaro * Enforce basic length checks, the rest 2915272840Smelifaro * should be done in userland. 2916272840Smelifaro * 2917272840Smelifaro * Returns 0 if name is considered valid. 2918272840Smelifaro */ 2919290332Saestatic int 2920290332Saecheck_table_name(const char *name) 2921232865Smelifaro{ 2922232865Smelifaro 2923272840Smelifaro /* 2924272840Smelifaro * TODO: do some more complicated checks 2925272840Smelifaro */ 2926290332Sae return (ipfw_check_object_name_generic(name)); 2927232865Smelifaro} 2928232865Smelifaro 2929272840Smelifaro/* 2930272840Smelifaro * Find tablename TLV by @uid. 2931272840Smelifaro * Check @tlvs for valid data inside. 2932272840Smelifaro * 2933272840Smelifaro * Returns pointer to found TLV or NULL. 2934272840Smelifaro */ 2935272840Smelifarostatic ipfw_obj_ntlv * 2936272840Smelifarofind_name_tlv(void *tlvs, int len, uint16_t uidx) 2937272840Smelifaro{ 2938272840Smelifaro ipfw_obj_ntlv *ntlv; 2939272840Smelifaro uintptr_t pa, pe; 2940272840Smelifaro int l; 2941272840Smelifaro 2942272840Smelifaro pa = (uintptr_t)tlvs; 2943272840Smelifaro pe = pa + len; 2944272840Smelifaro l = 0; 2945272840Smelifaro for (; pa < pe; pa += l) { 2946272840Smelifaro ntlv = (ipfw_obj_ntlv *)pa; 2947272840Smelifaro l = ntlv->head.length; 2948272840Smelifaro 2949272840Smelifaro if (l != sizeof(*ntlv)) 2950272840Smelifaro return (NULL); 2951272840Smelifaro 2952272840Smelifaro if (ntlv->head.type != IPFW_TLV_TBL_NAME) 2953272840Smelifaro continue; 2954272840Smelifaro 2955272840Smelifaro if (ntlv->idx != uidx) 2956272840Smelifaro continue; 2957272840Smelifaro 2958290332Sae if (check_table_name(ntlv->name) != 0) 2959272840Smelifaro return (NULL); 2960272840Smelifaro 2961272840Smelifaro return (ntlv); 2962272840Smelifaro } 2963272840Smelifaro 2964272840Smelifaro return (NULL); 2965272840Smelifaro} 2966272840Smelifaro 2967272840Smelifaro/* 2968272840Smelifaro * Finds table config based on either legacy index 2969272840Smelifaro * or name in ntlv. 2970272840Smelifaro * Note @ti structure contains unchecked data from userland. 2971272840Smelifaro * 2972282070Smelifaro * Returns 0 in success and fills in @tc with found config 2973272840Smelifaro */ 2974282070Smelifarostatic int 2975282070Smelifarofind_table_err(struct namedobj_instance *ni, struct tid_info *ti, 2976282070Smelifaro struct table_config **tc) 2977272840Smelifaro{ 2978272840Smelifaro char *name, bname[16]; 2979272840Smelifaro struct named_object *no; 2980272840Smelifaro ipfw_obj_ntlv *ntlv; 2981272840Smelifaro uint32_t set; 2982272840Smelifaro 2983272840Smelifaro if (ti->tlvs != NULL) { 2984272840Smelifaro ntlv = find_name_tlv(ti->tlvs, ti->tlen, ti->uidx); 2985272840Smelifaro if (ntlv == NULL) 2986282070Smelifaro return (EINVAL); 2987272840Smelifaro name = ntlv->name; 2988272840Smelifaro 2989272840Smelifaro /* 2990272840Smelifaro * Use set provided by @ti instead of @ntlv one. 2991272840Smelifaro * This is needed due to different sets behavior 2992272840Smelifaro * controlled by V_fw_tables_sets. 2993272840Smelifaro */ 2994272840Smelifaro set = ti->set; 2995272840Smelifaro } else { 2996272840Smelifaro snprintf(bname, sizeof(bname), "%d", ti->uidx); 2997272840Smelifaro name = bname; 2998272840Smelifaro set = 0; 2999272840Smelifaro } 3000272840Smelifaro 3001272840Smelifaro no = ipfw_objhash_lookup_name(ni, set, name); 3002282070Smelifaro *tc = (struct table_config *)no; 3003272840Smelifaro 3004282070Smelifaro return (0); 3005272840Smelifaro} 3006272840Smelifaro 3007272840Smelifaro/* 3008282070Smelifaro * Finds table config based on either legacy index 3009282070Smelifaro * or name in ntlv. 3010282070Smelifaro * Note @ti structure contains unchecked data from userland. 3011282070Smelifaro * 3012282070Smelifaro * Returns pointer to table_config or NULL. 3013282070Smelifaro */ 3014282070Smelifarostatic struct table_config * 3015282070Smelifarofind_table(struct namedobj_instance *ni, struct tid_info *ti) 3016282070Smelifaro{ 3017282070Smelifaro struct table_config *tc; 3018282070Smelifaro 3019282070Smelifaro if (find_table_err(ni, ti, &tc) != 0) 3020282070Smelifaro return (NULL); 3021282070Smelifaro 3022282070Smelifaro return (tc); 3023282070Smelifaro} 3024282070Smelifaro 3025282070Smelifaro/* 3026272840Smelifaro * Allocate new table config structure using 3027272840Smelifaro * specified @algo and @aname. 3028272840Smelifaro * 3029272840Smelifaro * Returns pointer to config or NULL. 3030272840Smelifaro */ 3031272840Smelifarostatic struct table_config * 3032272840Smelifaroalloc_table_config(struct ip_fw_chain *ch, struct tid_info *ti, 3033272840Smelifaro struct table_algo *ta, char *aname, uint8_t tflags) 3034272840Smelifaro{ 3035272840Smelifaro char *name, bname[16]; 3036272840Smelifaro struct table_config *tc; 3037272840Smelifaro int error; 3038272840Smelifaro ipfw_obj_ntlv *ntlv; 3039272840Smelifaro uint32_t set; 3040272840Smelifaro 3041272840Smelifaro if (ti->tlvs != NULL) { 3042272840Smelifaro ntlv = find_name_tlv(ti->tlvs, ti->tlen, ti->uidx); 3043272840Smelifaro if (ntlv == NULL) 3044272840Smelifaro return (NULL); 3045272840Smelifaro name = ntlv->name; 3046272840Smelifaro set = ntlv->set; 3047272840Smelifaro } else { 3048282070Smelifaro /* Compat part: convert number to string representation */ 3049272840Smelifaro snprintf(bname, sizeof(bname), "%d", ti->uidx); 3050272840Smelifaro name = bname; 3051272840Smelifaro set = 0; 3052272840Smelifaro } 3053272840Smelifaro 3054272840Smelifaro tc = malloc(sizeof(struct table_config), M_IPFW, M_WAITOK | M_ZERO); 3055272840Smelifaro tc->no.name = tc->tablename; 3056282070Smelifaro tc->no.subtype = ta->type; 3057272840Smelifaro tc->no.set = set; 3058272840Smelifaro tc->tflags = tflags; 3059272840Smelifaro tc->ta = ta; 3060272840Smelifaro strlcpy(tc->tablename, name, sizeof(tc->tablename)); 3061272840Smelifaro /* Set "shared" value type by default */ 3062272840Smelifaro tc->vshared = 1; 3063272840Smelifaro 3064272840Smelifaro /* Preallocate data structures for new tables */ 3065272840Smelifaro error = ta->init(ch, &tc->astate, &tc->ti_copy, aname, tflags); 3066272840Smelifaro if (error != 0) { 3067272840Smelifaro free(tc, M_IPFW); 3068272840Smelifaro return (NULL); 3069272840Smelifaro } 3070272840Smelifaro 3071272840Smelifaro return (tc); 3072272840Smelifaro} 3073272840Smelifaro 3074272840Smelifaro/* 3075272840Smelifaro * Destroys table state and config. 3076272840Smelifaro */ 3077272840Smelifarostatic void 3078272840Smelifarofree_table_config(struct namedobj_instance *ni, struct table_config *tc) 3079272840Smelifaro{ 3080272840Smelifaro 3081272840Smelifaro KASSERT(tc->linked == 0, ("free() on linked config")); 3082278259Smelifaro /* UH lock MUST NOT be held */ 3083272840Smelifaro 3084272840Smelifaro /* 3085272840Smelifaro * We're using ta without any locking/referencing. 3086272840Smelifaro * TODO: fix this if we're going to use unloadable algos. 3087272840Smelifaro */ 3088272840Smelifaro tc->ta->destroy(tc->astate, &tc->ti_copy); 3089272840Smelifaro free(tc, M_IPFW); 3090272840Smelifaro} 3091272840Smelifaro 3092272840Smelifaro/* 3093272840Smelifaro * Links @tc to @chain table named instance. 3094272840Smelifaro * Sets appropriate type/states in @chain table info. 3095272840Smelifaro */ 3096272840Smelifarostatic void 3097272840Smelifarolink_table(struct ip_fw_chain *ch, struct table_config *tc) 3098272840Smelifaro{ 3099272840Smelifaro struct namedobj_instance *ni; 3100272840Smelifaro struct table_info *ti; 3101272840Smelifaro uint16_t kidx; 3102272840Smelifaro 3103272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 3104272840Smelifaro IPFW_WLOCK_ASSERT(ch); 3105272840Smelifaro 3106272840Smelifaro ni = CHAIN_TO_NI(ch); 3107272840Smelifaro kidx = tc->no.kidx; 3108272840Smelifaro 3109272840Smelifaro ipfw_objhash_add(ni, &tc->no); 3110272840Smelifaro 3111272840Smelifaro ti = KIDX_TO_TI(ch, kidx); 3112272840Smelifaro *ti = tc->ti_copy; 3113272840Smelifaro 3114272840Smelifaro /* Notify algo on real @ti address */ 3115272840Smelifaro if (tc->ta->change_ti != NULL) 3116272840Smelifaro tc->ta->change_ti(tc->astate, ti); 3117272840Smelifaro 3118272840Smelifaro tc->linked = 1; 3119272840Smelifaro tc->ta->refcnt++; 3120272840Smelifaro} 3121272840Smelifaro 3122272840Smelifaro/* 3123272840Smelifaro * Unlinks @tc from @chain table named instance. 3124272840Smelifaro * Zeroes states in @chain and stores them in @tc. 3125272840Smelifaro */ 3126272840Smelifarostatic void 3127272840Smelifarounlink_table(struct ip_fw_chain *ch, struct table_config *tc) 3128272840Smelifaro{ 3129272840Smelifaro struct namedobj_instance *ni; 3130272840Smelifaro struct table_info *ti; 3131272840Smelifaro uint16_t kidx; 3132272840Smelifaro 3133272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 3134272840Smelifaro IPFW_WLOCK_ASSERT(ch); 3135272840Smelifaro 3136272840Smelifaro ni = CHAIN_TO_NI(ch); 3137272840Smelifaro kidx = tc->no.kidx; 3138272840Smelifaro 3139272840Smelifaro /* Clear state. @ti copy is already saved inside @tc */ 3140272840Smelifaro ipfw_objhash_del(ni, &tc->no); 3141272840Smelifaro ti = KIDX_TO_TI(ch, kidx); 3142272840Smelifaro memset(ti, 0, sizeof(struct table_info)); 3143272840Smelifaro tc->linked = 0; 3144272840Smelifaro tc->ta->refcnt--; 3145272840Smelifaro 3146272840Smelifaro /* Notify algo on real @ti address */ 3147272840Smelifaro if (tc->ta->change_ti != NULL) 3148272840Smelifaro tc->ta->change_ti(tc->astate, NULL); 3149272840Smelifaro} 3150272840Smelifaro 3151272840Smelifarostruct swap_table_args { 3152272840Smelifaro int set; 3153272840Smelifaro int new_set; 3154272840Smelifaro int mv; 3155272840Smelifaro}; 3156272840Smelifaro 3157272840Smelifaro/* 3158272840Smelifaro * Change set for each matching table. 3159272840Smelifaro * 3160272840Smelifaro * Ensure we dispatch each table once by setting/checking ochange 3161272840Smelifaro * fields. 3162272840Smelifaro */ 3163272840Smelifarostatic void 3164272840Smelifaroswap_table_set(struct namedobj_instance *ni, struct named_object *no, 3165272840Smelifaro void *arg) 3166272840Smelifaro{ 3167272840Smelifaro struct table_config *tc; 3168272840Smelifaro struct swap_table_args *sta; 3169272840Smelifaro 3170272840Smelifaro tc = (struct table_config *)no; 3171272840Smelifaro sta = (struct swap_table_args *)arg; 3172272840Smelifaro 3173272840Smelifaro if (no->set != sta->set && (no->set != sta->new_set || sta->mv != 0)) 3174272840Smelifaro return; 3175272840Smelifaro 3176272840Smelifaro if (tc->ochanged != 0) 3177272840Smelifaro return; 3178272840Smelifaro 3179272840Smelifaro tc->ochanged = 1; 3180272840Smelifaro ipfw_objhash_del(ni, no); 3181272840Smelifaro if (no->set == sta->set) 3182272840Smelifaro no->set = sta->new_set; 3183272840Smelifaro else 3184272840Smelifaro no->set = sta->set; 3185272840Smelifaro ipfw_objhash_add(ni, no); 3186272840Smelifaro} 3187272840Smelifaro 3188272840Smelifaro/* 3189272840Smelifaro * Cleans up ochange field for all tables. 3190272840Smelifaro */ 3191272840Smelifarostatic void 3192272840Smelifaroclean_table_set_data(struct namedobj_instance *ni, struct named_object *no, 3193272840Smelifaro void *arg) 3194272840Smelifaro{ 3195272840Smelifaro struct table_config *tc; 3196272840Smelifaro struct swap_table_args *sta; 3197272840Smelifaro 3198272840Smelifaro tc = (struct table_config *)no; 3199272840Smelifaro sta = (struct swap_table_args *)arg; 3200272840Smelifaro 3201272840Smelifaro tc->ochanged = 0; 3202272840Smelifaro} 3203272840Smelifaro 3204272840Smelifaro/* 3205272840Smelifaro * Swaps tables within two sets. 3206272840Smelifaro */ 3207272840Smelifarovoid 3208272840Smelifaroipfw_swap_tables_sets(struct ip_fw_chain *ch, uint32_t set, 3209272840Smelifaro uint32_t new_set, int mv) 3210272840Smelifaro{ 3211272840Smelifaro struct swap_table_args sta; 3212272840Smelifaro 3213272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 3214272840Smelifaro 3215272840Smelifaro sta.set = set; 3216272840Smelifaro sta.new_set = new_set; 3217272840Smelifaro sta.mv = mv; 3218272840Smelifaro 3219272840Smelifaro ipfw_objhash_foreach(CHAIN_TO_NI(ch), swap_table_set, &sta); 3220272840Smelifaro ipfw_objhash_foreach(CHAIN_TO_NI(ch), clean_table_set_data, &sta); 3221272840Smelifaro} 3222272840Smelifaro 3223272840Smelifaro/* 3224272840Smelifaro * Move all tables which are reference by rules in @rr to set @new_set. 3225272840Smelifaro * Makes sure that all relevant tables are referenced ONLLY by given rules. 3226272840Smelifaro * 3227272840Smelifaro * Retuns 0 on success, 3228272840Smelifaro */ 3229272840Smelifaroint 3230272840Smelifaroipfw_move_tables_sets(struct ip_fw_chain *ch, ipfw_range_tlv *rt, 3231272840Smelifaro uint32_t new_set) 3232272840Smelifaro{ 3233272840Smelifaro struct ip_fw *rule; 3234272840Smelifaro struct table_config *tc; 3235272840Smelifaro struct named_object *no; 3236272840Smelifaro struct namedobj_instance *ni; 3237272840Smelifaro int bad, i, l, cmdlen; 3238272840Smelifaro uint16_t kidx; 3239272840Smelifaro ipfw_insn *cmd; 3240272840Smelifaro 3241272840Smelifaro IPFW_UH_WLOCK_ASSERT(ch); 3242272840Smelifaro 3243272840Smelifaro ni = CHAIN_TO_NI(ch); 3244272840Smelifaro 3245272840Smelifaro /* Stage 1: count number of references by given rules */ 3246272840Smelifaro for (i = 0; i < ch->n_rules - 1; i++) { 3247272840Smelifaro rule = ch->map[i]; 3248272840Smelifaro if (ipfw_match_range(rule, rt) == 0) 3249272840Smelifaro continue; 3250272840Smelifaro 3251272840Smelifaro l = rule->cmd_len; 3252272840Smelifaro cmd = rule->cmd; 3253272840Smelifaro cmdlen = 0; 3254272840Smelifaro for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3255272840Smelifaro cmdlen = F_LEN(cmd); 3256282070Smelifaro if (classify_opcode_kidx(cmd, &kidx) != 0) 3257272840Smelifaro continue; 3258272840Smelifaro no = ipfw_objhash_lookup_kidx(ni, kidx); 3259272840Smelifaro KASSERT(no != NULL, 3260272840Smelifaro ("objhash lookup failed on index %d", kidx)); 3261272840Smelifaro tc = (struct table_config *)no; 3262272840Smelifaro tc->ocount++; 3263272840Smelifaro } 3264272840Smelifaro 3265272840Smelifaro } 3266272840Smelifaro 3267272840Smelifaro /* Stage 2: verify "ownership" */ 3268272840Smelifaro bad = 0; 3269272840Smelifaro for (i = 0; i < ch->n_rules - 1; i++) { 3270272840Smelifaro rule = ch->map[i]; 3271272840Smelifaro if (ipfw_match_range(rule, rt) == 0) 3272272840Smelifaro continue; 3273272840Smelifaro 3274272840Smelifaro l = rule->cmd_len; 3275272840Smelifaro cmd = rule->cmd; 3276272840Smelifaro cmdlen = 0; 3277272840Smelifaro for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3278272840Smelifaro cmdlen = F_LEN(cmd); 3279282070Smelifaro if (classify_opcode_kidx(cmd, &kidx) != 0) 3280272840Smelifaro continue; 3281272840Smelifaro no = ipfw_objhash_lookup_kidx(ni, kidx); 3282272840Smelifaro KASSERT(no != NULL, 3283272840Smelifaro ("objhash lookup failed on index %d", kidx)); 3284272840Smelifaro tc = (struct table_config *)no; 3285272840Smelifaro if (tc->no.refcnt != tc->ocount) { 3286272840Smelifaro 3287272840Smelifaro /* 3288272840Smelifaro * Number of references differ: 3289272840Smelifaro * Other rule(s) are holding reference to given 3290272840Smelifaro * table, so it is not possible to change its set. 3291272840Smelifaro * 3292272840Smelifaro * Note that refcnt may account 3293272840Smelifaro * references to some going-to-be-added rules. 3294272840Smelifaro * Since we don't know their numbers (and event 3295272840Smelifaro * if they will be added) it is perfectly OK 3296272840Smelifaro * to return error here. 3297272840Smelifaro */ 3298272840Smelifaro bad = 1; 3299272840Smelifaro break; 3300272840Smelifaro } 3301272840Smelifaro } 3302272840Smelifaro 3303272840Smelifaro if (bad != 0) 3304272840Smelifaro break; 3305272840Smelifaro } 3306272840Smelifaro 3307272840Smelifaro /* Stage 3: change set or cleanup */ 3308272840Smelifaro for (i = 0; i < ch->n_rules - 1; i++) { 3309272840Smelifaro rule = ch->map[i]; 3310272840Smelifaro if (ipfw_match_range(rule, rt) == 0) 3311272840Smelifaro continue; 3312272840Smelifaro 3313272840Smelifaro l = rule->cmd_len; 3314272840Smelifaro cmd = rule->cmd; 3315272840Smelifaro cmdlen = 0; 3316272840Smelifaro for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3317272840Smelifaro cmdlen = F_LEN(cmd); 3318282070Smelifaro if (classify_opcode_kidx(cmd, &kidx) != 0) 3319272840Smelifaro continue; 3320272840Smelifaro no = ipfw_objhash_lookup_kidx(ni, kidx); 3321272840Smelifaro KASSERT(no != NULL, 3322272840Smelifaro ("objhash lookup failed on index %d", kidx)); 3323272840Smelifaro tc = (struct table_config *)no; 3324272840Smelifaro 3325272840Smelifaro tc->ocount = 0; 3326272840Smelifaro if (bad != 0) 3327272840Smelifaro continue; 3328272840Smelifaro 3329272840Smelifaro /* Actually change set. */ 3330272840Smelifaro ipfw_objhash_del(ni, no); 3331272840Smelifaro no->set = new_set; 3332272840Smelifaro ipfw_objhash_add(ni, no); 3333272840Smelifaro } 3334272840Smelifaro } 3335272840Smelifaro 3336272840Smelifaro return (bad); 3337272840Smelifaro} 3338272840Smelifaro 3339272840Smelifaro/* 3340282070Smelifaro * Finds and bumps refcount for objects referenced by given @rule. 3341272840Smelifaro * Auto-creates non-existing tables. 3342272840Smelifaro * Fills in @oib array with userland/kernel indexes. 3343272840Smelifaro * 3344272840Smelifaro * Returns 0 on success. 3345272840Smelifaro */ 3346272840Smelifarostatic int 3347282070Smelifaroref_rule_objects(struct ip_fw_chain *ch, struct ip_fw *rule, 3348282070Smelifaro struct rule_check_info *ci, struct obj_idx *oib, struct tid_info *ti) 3349272840Smelifaro{ 3350272840Smelifaro int cmdlen, error, l, numnew; 3351272840Smelifaro ipfw_insn *cmd; 3352282070Smelifaro struct obj_idx *pidx; 3353282070Smelifaro int found, unresolved; 3354272840Smelifaro 3355282070Smelifaro pidx = oib; 3356272840Smelifaro l = rule->cmd_len; 3357272840Smelifaro cmd = rule->cmd; 3358272840Smelifaro cmdlen = 0; 3359272840Smelifaro error = 0; 3360272840Smelifaro numnew = 0; 3361282070Smelifaro found = 0; 3362282070Smelifaro unresolved = 0; 3363272840Smelifaro 3364272840Smelifaro IPFW_UH_WLOCK(ch); 3365272840Smelifaro 3366272840Smelifaro /* Increase refcount on each existing referenced table. */ 3367272840Smelifaro for ( ; l > 0 ; l -= cmdlen, cmd += cmdlen) { 3368272840Smelifaro cmdlen = F_LEN(cmd); 3369272840Smelifaro 3370282070Smelifaro error = ref_opcode_object(ch, cmd, ti, pidx, &found, &unresolved); 3371282070Smelifaro if (error != 0) 3372282070Smelifaro break; 3373282070Smelifaro if (found || unresolved) { 3374282070Smelifaro pidx->off = rule->cmd_len - l; 3375272840Smelifaro pidx++; 3376272840Smelifaro } 3377272840Smelifaro /* 3378272840Smelifaro * Compability stuff for old clients: 3379282070Smelifaro * prepare to manually create non-existing objects. 3380272840Smelifaro */ 3381282070Smelifaro if (unresolved) 3382282070Smelifaro numnew++; 3383272840Smelifaro } 3384272840Smelifaro 3385272840Smelifaro if (error != 0) { 3386272840Smelifaro /* Unref everything we have already done */ 3387282070Smelifaro unref_oib_objects(ch, rule->cmd, oib, pidx); 3388272840Smelifaro IPFW_UH_WUNLOCK(ch); 3389272840Smelifaro return (error); 3390272840Smelifaro } 3391282070Smelifaro IPFW_UH_WUNLOCK(ch); 3392272840Smelifaro 3393282070Smelifaro /* Perform auto-creation for non-existing objects */ 3394282070Smelifaro if (numnew != 0) 3395282070Smelifaro error = create_objects_compat(ch, rule->cmd, oib, pidx, ti); 3396272840Smelifaro 3397290334Sae /* Calculate real number of dynamic objects */ 3398290334Sae ci->object_opcodes = (uint16_t)(pidx - oib); 3399290334Sae 3400272840Smelifaro return (error); 3401272840Smelifaro} 3402272840Smelifaro 3403272840Smelifaro/* 3404272840Smelifaro * Checks is opcode is referencing table of appropriate type. 3405272840Smelifaro * Adds reference count for found table if true. 3406272840Smelifaro * Rewrites user-supplied opcode values with kernel ones. 3407272840Smelifaro * 3408272840Smelifaro * Returns 0 on success and appropriate error code otherwise. 3409272840Smelifaro */ 3410272840Smelifaroint 3411282070Smelifaroipfw_rewrite_rule_uidx(struct ip_fw_chain *chain, 3412272840Smelifaro struct rule_check_info *ci) 3413272840Smelifaro{ 3414282070Smelifaro int error; 3415272840Smelifaro ipfw_insn *cmd; 3416272840Smelifaro uint8_t type; 3417272840Smelifaro struct obj_idx *p, *pidx_first, *pidx_last; 3418272840Smelifaro struct tid_info ti; 3419272840Smelifaro 3420272840Smelifaro /* 3421272840Smelifaro * Prepare an array for storing opcode indices. 3422272840Smelifaro * Use stack allocation by default. 3423272840Smelifaro */ 3424282070Smelifaro if (ci->object_opcodes <= (sizeof(ci->obuf)/sizeof(ci->obuf[0]))) { 3425272840Smelifaro /* Stack */ 3426272840Smelifaro pidx_first = ci->obuf; 3427272840Smelifaro } else 3428282070Smelifaro pidx_first = malloc(ci->object_opcodes * sizeof(struct obj_idx), 3429272840Smelifaro M_IPFW, M_WAITOK | M_ZERO); 3430272840Smelifaro 3431272840Smelifaro error = 0; 3432272840Smelifaro type = 0; 3433272840Smelifaro memset(&ti, 0, sizeof(ti)); 3434272840Smelifaro 3435272840Smelifaro /* 3436272840Smelifaro * Use default set for looking up tables (old way) or 3437272840Smelifaro * use set rule is assigned to (new way). 3438272840Smelifaro */ 3439272840Smelifaro ti.set = (V_fw_tables_sets != 0) ? ci->krule->set : 0; 3440272840Smelifaro if (ci->ctlv != NULL) { 3441272840Smelifaro ti.tlvs = (void *)(ci->ctlv + 1); 3442272840Smelifaro ti.tlen = ci->ctlv->head.length - sizeof(ipfw_obj_ctlv); 3443272840Smelifaro } 3444272840Smelifaro 3445282070Smelifaro /* Reference all used tables and other objects */ 3446282070Smelifaro error = ref_rule_objects(chain, ci->krule, ci, pidx_first, &ti); 3447272840Smelifaro if (error != 0) 3448272840Smelifaro goto free; 3449290334Sae /* 3450290334Sae * Note that ref_rule_objects() might have updated ci->object_opcodes 3451290334Sae * to reflect actual number of object opcodes. 3452290334Sae */ 3453272840Smelifaro 3454272840Smelifaro /* Perform rule rewrite */ 3455272840Smelifaro p = pidx_first; 3456290334Sae pidx_last = pidx_first + ci->object_opcodes; 3457282070Smelifaro for (p = pidx_first; p < pidx_last; p++) { 3458282070Smelifaro cmd = ci->krule->cmd + p->off; 3459282070Smelifaro update_opcode_kidx(cmd, p->kidx); 3460272840Smelifaro } 3461272840Smelifaro 3462272840Smelifarofree: 3463272840Smelifaro if (pidx_first != ci->obuf) 3464272840Smelifaro free(pidx_first, M_IPFW); 3465272840Smelifaro 3466272840Smelifaro return (error); 3467272840Smelifaro} 3468272840Smelifaro 3469272840Smelifarostatic struct ipfw_sopt_handler scodes[] = { 3470272840Smelifaro { IP_FW_TABLE_XCREATE, 0, HDIR_SET, create_table }, 3471272840Smelifaro { IP_FW_TABLE_XDESTROY, 0, HDIR_SET, flush_table_v0 }, 3472272840Smelifaro { IP_FW_TABLE_XFLUSH, 0, HDIR_SET, flush_table_v0 }, 3473272840Smelifaro { IP_FW_TABLE_XMODIFY, 0, HDIR_BOTH, modify_table }, 3474272840Smelifaro { IP_FW_TABLE_XINFO, 0, HDIR_GET, describe_table }, 3475272840Smelifaro { IP_FW_TABLES_XLIST, 0, HDIR_GET, list_tables }, 3476272840Smelifaro { IP_FW_TABLE_XLIST, 0, HDIR_GET, dump_table_v0 }, 3477272840Smelifaro { IP_FW_TABLE_XLIST, 1, HDIR_GET, dump_table_v1 }, 3478272840Smelifaro { IP_FW_TABLE_XADD, 0, HDIR_BOTH, manage_table_ent_v0 }, 3479272840Smelifaro { IP_FW_TABLE_XADD, 1, HDIR_BOTH, manage_table_ent_v1 }, 3480272840Smelifaro { IP_FW_TABLE_XDEL, 0, HDIR_BOTH, manage_table_ent_v0 }, 3481272840Smelifaro { IP_FW_TABLE_XDEL, 1, HDIR_BOTH, manage_table_ent_v1 }, 3482272840Smelifaro { IP_FW_TABLE_XFIND, 0, HDIR_GET, find_table_entry }, 3483272840Smelifaro { IP_FW_TABLE_XSWAP, 0, HDIR_SET, swap_table }, 3484272840Smelifaro { IP_FW_TABLES_ALIST, 0, HDIR_GET, list_table_algo }, 3485272840Smelifaro { IP_FW_TABLE_XGETSIZE, 0, HDIR_GET, get_table_size }, 3486272840Smelifaro}; 3487272840Smelifaro 3488272840Smelifarostatic void 3489272840Smelifarodestroy_table_locked(struct namedobj_instance *ni, struct named_object *no, 3490272840Smelifaro void *arg) 3491272840Smelifaro{ 3492272840Smelifaro 3493272840Smelifaro unlink_table((struct ip_fw_chain *)arg, (struct table_config *)no); 3494272840Smelifaro if (ipfw_objhash_free_idx(ni, no->kidx) != 0) 3495272840Smelifaro printf("Error unlinking kidx %d from table %s\n", 3496272840Smelifaro no->kidx, no->name); 3497272840Smelifaro free_table_config(ni, (struct table_config *)no); 3498272840Smelifaro} 3499272840Smelifaro 3500272840Smelifaro/* 3501272840Smelifaro * Shuts tables module down. 3502272840Smelifaro */ 3503272840Smelifarovoid 3504272840Smelifaroipfw_destroy_tables(struct ip_fw_chain *ch, int last) 3505272840Smelifaro{ 3506272840Smelifaro 3507272840Smelifaro IPFW_DEL_SOPT_HANDLER(last, scodes); 3508282070Smelifaro IPFW_DEL_OBJ_REWRITER(last, opcodes); 3509272840Smelifaro 3510272840Smelifaro /* Remove all tables from working set */ 3511272840Smelifaro IPFW_UH_WLOCK(ch); 3512272840Smelifaro IPFW_WLOCK(ch); 3513272840Smelifaro ipfw_objhash_foreach(CHAIN_TO_NI(ch), destroy_table_locked, ch); 3514272840Smelifaro IPFW_WUNLOCK(ch); 3515272840Smelifaro IPFW_UH_WUNLOCK(ch); 3516272840Smelifaro 3517272840Smelifaro /* Free pointers itself */ 3518272840Smelifaro free(ch->tablestate, M_IPFW); 3519272840Smelifaro 3520272840Smelifaro ipfw_table_value_destroy(ch, last); 3521272840Smelifaro ipfw_table_algo_destroy(ch); 3522272840Smelifaro 3523272840Smelifaro ipfw_objhash_destroy(CHAIN_TO_NI(ch)); 3524272840Smelifaro free(CHAIN_TO_TCFG(ch), M_IPFW); 3525272840Smelifaro} 3526272840Smelifaro 3527272840Smelifaro/* 3528272840Smelifaro * Starts tables module. 3529272840Smelifaro */ 3530272840Smelifaroint 3531272840Smelifaroipfw_init_tables(struct ip_fw_chain *ch, int first) 3532272840Smelifaro{ 3533272840Smelifaro struct tables_config *tcfg; 3534272840Smelifaro 3535272840Smelifaro /* Allocate pointers */ 3536272840Smelifaro ch->tablestate = malloc(V_fw_tables_max * sizeof(struct table_info), 3537272840Smelifaro M_IPFW, M_WAITOK | M_ZERO); 3538272840Smelifaro 3539272840Smelifaro tcfg = malloc(sizeof(struct tables_config), M_IPFW, M_WAITOK | M_ZERO); 3540272840Smelifaro tcfg->namehash = ipfw_objhash_create(V_fw_tables_max); 3541272840Smelifaro ch->tblcfg = tcfg; 3542272840Smelifaro 3543272840Smelifaro ipfw_table_value_init(ch, first); 3544272840Smelifaro ipfw_table_algo_init(ch); 3545272840Smelifaro 3546282070Smelifaro IPFW_ADD_OBJ_REWRITER(first, opcodes); 3547272840Smelifaro IPFW_ADD_SOPT_HANDLER(first, scodes); 3548272840Smelifaro return (0); 3549272840Smelifaro} 3550272840Smelifaro 3551272840Smelifaro 3552272840Smelifaro 3553